Diesel vs Gasoline Engines: Key Differences

Posted on March 28, 2025March 27, 2025 by Armor Lubricants

Why do not we make one motor oil for both diesel and petrol engines? Because they are different from each other. 5W30 engine oil for diesel engines do not have same components as 5W30 for petrol even if they share the base oil.

What are the fundamental differences between diesel and gasoline engines?

Diesel and gasoline engines operate on internal combustion principles, but their components, fuel injection, lubrication, cooling, and exhaust systems differ significantly. These differences impact performance, fuel efficiency, and maintenance requirements.

Components of Internal Combustion Engines

Both engine types consist of pistons, cylinders, crankshafts, and valves, but their design varies based on combustion pressure and fuel type.

Diesel Engines – Built with stronger, heavier components to withstand higher compression ratios (typically 14:1 to 25:1). They also feature glow plugs for cold starts.
Gasoline Engines – Have lighter components designed for lower compression ratios (8:1 to 12:1), relying on spark plugs for ignition.

Injection System

Fuel injection is one of the key differences between diesel and gasoline engines, affecting efficiency and combustion characteristics.

Diesel Engines – Use direct fuel injection at high pressure, ensuring better fuel atomization and higher efficiency.
Gasoline Engines – Typically use port fuel injection (PFI) or direct injection (GDI), requiring precise air-fuel mixture control for smooth performance.

Lubrication System

Lubrication is critical for engine longevity, but diesel and gasoline engines require different oil formulations.

Diesel Engines: Require thicker, high-detergent oils to handle soot and combustion byproducts. Lubrication must support higher loads and extreme pressures.
Gasoline Engines: Use lighter, lower-detergent oils that optimize fuel efficiency and catalytic converter longevity.

Cooling System

The cooling requirements differ due to combustion temperatures and engine loads.

Diesel Engines: Generate more heat due to high compression, requiring larger radiators and heavy-duty cooling systems.
Gasoline Engines: Run at lower combustion temperatures, needing smaller cooling systems.

Exhaust System

Emission control technologies vary between the two engine types.

Diesel Engines: Equipped with Diesel Particulate Filters (DPF) and Selective Catalytic Reduction (SCR) to reduce soot and nitrogen oxides.
Gasoline Engines: Use Three-Way Catalytic Converters (TWC) to manage carbon monoxide, hydrocarbons, and nitrogen oxides.

How do diesel and petrol engines ignite fuel?

Diesel and gasoline engines use different ignition methods due to their distinct combustion processes and fuel properties.

Diesel Engines – Rely on compression ignition (CI). The air is highly compressed inside the cylinder, raising its temperature. Fuel is then injected directly into the hot, pressurized air, igniting spontaneously without a spark.

Gasoline Engines – Use spark ignition (SI). A mixture of air and fuel is compressed, and a spark plug ignites the mixture at the right moment, creating controlled combustion.

What’s the difference in compression ratios?

The compression ratio refers to how much the air-fuel mixture is compressed before ignition. Diesel engines have significantly higher compression ratios than gasoline engines.

Diesel Engines – Typically have a compression ratio between 14:1 and 25:1. Higher compression increases thermal efficiency, making diesel engines more fuel-efficient.

Gasoline Engines – Operate with a compression ratio between 8:1 and 12:1. Lower compression prevents premature detonation (knocking) and supports smoother combustion with a spark plug.

How does fuel efficiency compare between diesel and gasoline engines?

Fuel efficiency differs significantly between diesel and gasoline engines due to their combustion processes, energy density, and thermal efficiency. Diesel engines generally consume less fuel while delivering higher mileage, making them the preferred choice for heavy-duty applications and long-distance travel.

Why Are Diesel Engines More Fuel-Efficient?

Higher Compression Ratios
Diesel engines have compression ratios between 14:1 and 25:1, compared to 8:1 to 12:1 in gasoline engines.
Higher compression increases thermal efficiency, allowing diesel engines to extract more energy from each drop of fuel.
Energy Density of Diesel Fuel
Diesel fuel contains more energy per liter than gasoline.
This results in better fuel economy, especially for vehicles covering long distances.
Leaner Air-Fuel Mixtures
Diesel engines operate with a leaner air-fuel mixture, meaning they use less fuel per unit of air than gasoline engines.
This helps improve fuel efficiency and reduces fuel consumption under low loads.
Lower Engine Speed (RPM)
Diesel engines run at lower RPMs, reducing fuel consumption.
Gasoline engines operate at higher RPMs, consuming more fuel to maintain power output.

Fuel Consumption Comparison

Diesel Engines: Typically provide 20-30% better fuel economy than gasoline engines of similar size and power.
Gasoline Engines: Burn fuel more quickly due to their lower compression ratios and higher RPM operation.

What’s the impact on long-term fuel costs?

Long-term fuel costs depend on fuel efficiency, fuel prices, and maintenance expenses. Diesel engines typically have lower fuel consumption, leading to cost savings over time, but factors like fuel prices, initial costs, and maintenance influence overall expenses.

Why Diesel Engines Reduce Long-Term Fuel Costs

Better Fuel Economy
Diesel engines consume 20-30% less fuel than gasoline engines for the same distance traveled.
Lower fuel consumption means fewer refueling stops and reduced spending over time.
Higher Energy Density of Diesel Fuel

Diesel contains more energy per liter, delivering better mileage compared to gasoline.
This is especially beneficial for long-distance driving and commercial vehicles.
Lower RPM Operation
Diesel engines run at lower RPMs, reducing fuel burn.
Less strain on the engine helps maintain fuel efficiency over the vehicle’s lifespan.

How do emissions and environmental impact differ between diesel and gasoline engines?

Diesel and gasoline engines differ significantly in their emissions and overall environmental impact. While diesel engines are more fuel-efficient and produce less CO₂ per kilometer, they generate higher nitrogen oxides (NOx) and particulate matter (PM). Gasoline engines, on the other hand, emit more CO₂ but lower levels of harmful pollutants, making them cleaner in certain conditions.

Differences in CO₂ Emissions

Carbon dioxide (CO₂) emissions are directly related to fuel consumption. Diesel engines are more efficient than gasoline engines, meaning they burn less fuel to travel the same distance, resulting in lower CO₂ emissions per kilometer. However, diesel fuel itself contains more carbon per liter, which slightly offsets its efficiency advantage.

Diesel Engines: Emit 10-20% less CO₂ than gasoline engines due to higher fuel efficiency.
Gasoline Engines: Emit more CO₂ per kilometer since they consume more fuel.

While diesel engines contribute less to global warming in terms of CO₂ emissions, they create more local air pollution due to NOx and particulate matter.

Particulate Matter (PM) and NOx Emissions

Diesel engines generate higher levels of nitrogen oxides (NOx) and particulate matter (PM) compared to gasoline engines. NOx emissions contribute to smog, acid rain, and respiratory problems, while PM consists of fine soot particles that pose serious health risks when inhaled.

Diesel Engines: Produce significantly more NOx and PM due to high-temperature combustion and the absence of a controlled air-fuel mixture. Older diesel vehicles were major contributors to urban air pollution, but modern diesel engines incorporate advanced emission controls to limit these pollutants.
Gasoline Engines: Emit lower levels of NOx and PM because of lower combustion temperatures and better air-fuel mixing. Direct-injection gasoline engines, however, have been found to emit more fine particulates compared to traditional port fuel injection systems.

Emission Control Technologies in Modern Engines

Both diesel and gasoline engines use advanced emission control systems to reduce harmful pollutants and comply with strict environmental regulations.

Gasoline Engines:

Diesel Particulate Filters (DPF) – Captures and burns off fine soot particles to reduce PM emissions.
Selective Catalytic Reduction (SCR) – Uses AdBlue (urea solution) to convert NOx into harmless nitrogen and water vapor.
Exhaust Gas Recirculation (EGR) – Recirculates a portion of exhaust gases back into the engine to lower combustion temperatures and reduce NOx formation.

Gasoline Engines:

Three-Way Catalytic Converters (TWC) – Converts NOx, CO, and unburned hydrocarbons into less harmful gases.
trong data-start=”3238″ data-end=”3276″>Gasoline Particulate Filters (GPF) – Similar to DPF, but used in direct-injection gasoline engines to reduce fine particulates.
EGR Systems – Also used in some gasoline engines to lower NOx emissions.

How do service intervals differ?

Service intervals vary between diesel and gasoline engines due to differences in oil contamination, engine load, and operating conditions. Diesel engines typically require less frequent oil changes but demand stricter maintenance for components like fuel filters and emission systems.

Oil Change Intervals

Diesel Engines – Require oil changes every 10,000 to 25,000 km, depending on the engine type and oil quality. Diesel oil contains more detergents and dispersants to handle soot and combustion byproducts. However, heavy-duty applications may require more frequent changes due to higher loads and extreme conditions.
Gasoline Engines – Typically need oil changes every 5,000 to 15,000 km, as gasoline burns cleaner than diesel and produces fewer contaminants. Modern synthetic oils extend service intervals, but gasoline engines still require more frequent oil changes than diesel engines.

Fuel and Air Filter Maintenance

Diesel Engines – Require more frequent fuel filter changes, often every 15,000 to 30,000 km, since diesel fuel contains more impurities and water content. Diesel air filters also require regular checks due to higher soot levels.
Gasoline Engines – Fuel filters generally last longer and may not need replacement for 50,000 km or more. Air filters need periodic inspection, but gasoline engines produce less soot, reducing clogging.

Emission System Maintenance

Diesel Engines – Require Diesel Particulate Filter (DPF) regeneration and maintenance to prevent clogging. Selective Catalytic Reduction (SCR) systems also need AdBlue refills.
Gasoline Engines – Need periodic catalytic converter inspections, but emission control components generally require less frequent servicing than diesel systems.

Do Fuel Additives Work? The Truth About Fuel Additives.

Posted on March 24, 2025March 24, 2025 by Armor Lubricants

Yes, Fuel additives can clean your engine, improve performance, and enhance fuel economy. Effectiveness varies depending on some reasons but with good quality fuel additive you can see results at the same day!

What Are Fuel Additives and How Do They Work?

Fuel additives are chemical compounds added to gasoline or diesel to enhance fuel quality, improve engine performance, and protect fuel system components. They help clean deposits, reduce emissions, and optimize combustion.

Fuel additives are substances mixed with fuel to modify its properties, improve efficiency, and prevent engine-related issues. These additives serve various functions, such as cleaning injectors, boosting octane, and stabilizing stored fuel.

How Do Fuel Additives Work?

Fuel additives can help modify fuel properties to optimize engine performance. Different types serve different functions, including:

Detergents: Remove carbon deposits from fuel injectors and intake valves, improving combustion.
Lubricants: Reduce friction in fuel pumps and injectors, extending component life.
Octane Boosters: Raise fuel octane levels to prevent knocking in high-performance engines.
Fuel Stabilizers: Prevent fuel degradation in stored vehicles or seasonal equipment.
Anti-gel Additives: Keep diesel fuel from thickening in cold temperatures, ensuring smooth flow.

Do Fuel Additives Improve Efficiency?

Yes, fuel additives can improve efficiency. They enhance combustion, clean fuel system components, and optimize engine performance. The image shows two fuel injectors, one with poor spray quality and another with an improved spray pattern, highlighting how cleaner injectors lead to better fuel atomization and efficiency.

How Fuel Additives Improve Efficiency

1. Cleaning Fuel Injectors: Fuel injector cleaners remove Carbon deposits and dirt restoring proper spray and improving fuel combustion.

2. Preventing Fuel System Corrosion: Additives with anti-corrosion properties protect metal components, ensuring optimal fuel delivery.

3. Reducing Engine Deposits: Detergents in fuel additives prevent carbon buildup on valves, pistons, and combustion chambers, leading to cleaner burns and improved efficiency.

How Fuel Additives Improve Engine Performance

Contaminated fuel burns leaving carbon deposits, dirt, and varnish to accumulate inside the engine affecting different parts like fuel injectors, intake valves, and combustion chambers. These buildups reduce fuel efficiency, cause rough idling, and lead to performance issues like knocking or hesitation.

Fuel additives help by cleaning fuel system components, restoring lost efficiency, and enhancing combustion. Detergent additives remove carbon deposits from injectors and intake valves, improving fuel flow and spray patterns.

Octane boosters prevent knocking, ensuring smoother acceleration. Lubricating additives reduce friction in the fuel system, protecting injectors and pumps. Using the right fuel additive can result in better throttle response, improved mileage, and a longer-lasting engine.

Types of Fuel Additives Available in the Market

Gasoline and diesel engines are built differently! Gasoline engines rely on precise fuel injection and combustion timing, while diesel engines operate under high compression, making them more prone to carbon buildup and injector clogging.

Petrol System Cleaners

Petrol system cleaners help remove carbon deposits from fuel injectors, intake valves, and combustion chambers. These additives improve fuel atomization, ensuring better combustion and smoother engine performance. Regular use helps restore lost power and improve throttle response.

Diesel System Cleaners

Diesel system cleaners target issues like injector deposits, soot buildup, and fuel contamination. They help maintain proper spray patterns for efficient combustion, reducing emissions and improving fuel economy. Diesel additives also assist in preventing fuel thickening in cold temperatures, keeping the engine running smoothly.

Diesel Additives: What You Need to Know

Diesel fuel additives improve engine efficiency, protect critical components, and enhance fuel quality. They help prevent injector clogging, reduce emissions, and improve combustion, making them essential for maintaining diesel engines.

Why Are Diesel Fuel Additives Important?

Diesel engines operate under high compression, making them prone to carbon buildup, fuel contamination, and injector deposits. Over time, these issues reduce fuel efficiency, cause rough idling, and lead to increased wear on engine parts. Using diesel additives helps clean the fuel system, prevent fuel thickening in cold weather, and improve overall performance.

When Should You Use Diesel Fuel Additives?

If injectors are clogged, leading to rough idling or power loss.
During cold weather, to prevent diesel fuel from gelling.
For stored diesel fuel, to maintain quality and prevent degradation.
When using low-quality diesel, to reduce contamination and improve combustion.

How to Use Diesel System Cleaner

Applying a diesel system cleaner is simple, and does not require professionals or mechanic visit. There are two ways to apply the additive: via the fuel tank or through the fuel filter.

Method 1: Application via Fuel Tank

This method is simple and requires no special equipment.

Pour one 300 ml bottle into 30 litres of fuel for the best results.
Drive the vehicle on a 30 km highway test run to allow the cleaner to circulate.
The additive will remove deposits from injectors and the fuel system during operation.

Method 2: Application via Fuel Filter

This approach is commonly performed in a workshop and involves direct cleaning of the fuel system.

Replace the fuel filter with a new one.
Pour one 300 ml bottle directly into the filter.
Remount the filter and remove trapped air from the system.
Run the engine for 10 minutes, gradually increasing speed up to 2000 rpm.

Gasoline Fuel Additives: What You Need to Know

Gasoline fuel additives enhance engine performance, improve fuel efficiency, and protect fuel system components. They help clean injectors, prevent carbon buildup, and optimize combustion, ensuring a smoother and more reliable driving experience.

Why Are Petrol Fuel Additives Important?

Over time, gasoline engines accumulate deposits in fuel injectors, intake valves, and combustion chambers. These buildups reduce fuel economy, cause rough idling, and lead to sluggish acceleration. Poor-quality fuel can also contribute to these issues, making additives essential for maintaining engine health.

When Should You Use Gasoline Fuel Additives?

If the engine has rough idling or hesitation, caused by clogged fuel injectors.
When using lower-quality gasoline, to improve combustion and prevent deposits.
For high-mileage vehicles, to restore lost power and improve fuel efficiency.
Before long-term storage, to prevent fuel degradation and maintain engine readiness.

How to Use Petrol System Cleaner

Applying a fuel additive is simple and requires only a few steps for effective results.

Shake the bottle well before use.
Open the fuel tank cap.
Pour the entire 300 ml bottle into 80 litres of fuel.
For 40 litres of fuel, use half a bottle (150 ml).
Close the fuel tank securely and drive normally for the additive to mix and work effectively.

When Should You Use a Fuel Additive in your car?

Engines in new cars are clean; gas has barely caused any bad buildup or clogging at this point. Using fuel additives for a new vehicle seems like a waste of money. So here we come to a question, how old should the car be to use fuel additive?

We have two ways to measure, mileage, or time. If you drive excessively, it is a good idea to start buy additives after around 30,000 Kms. If you are not Infrequent driver three years is a good milestone for using fuel injector cleaner or other fuel performance enhancer.

Best Fuel Injector Cleaner

Many additives claim to clean your engine, but most don’t have enough cleaning power to make a real difference. If the formula isn’t strong enough, you won’t see the immediate results you expect.

Armor Performance Improver stands out. This high-powered gasoline fuel injector cleaner is packed with concentrated detergents designed to break down stubborn deposits in injectors, valves, and combustion chambers. It’s not just a surface clean—it’s a deep cleanse that restores lost power, improves throttle response, and even boosts fuel economy by up to 5.7%.

If you want fewer emissions, better mileage, and a smoother-running engine, using a cleaner with the right concentration is key. Armor delivers that powerful clean, helping your engine perform like it should.

Fuel Injector Cleaners: Do They Really Work?

You might know few people who tried them and did not work, but does that mean all of them do not? To get the results you desire, you have to look for the Best Fuel Injector Cleaner, and it is not that hard to do so. Factors to determine quality are easy to find.

Brand should be the first factor, it does not mean you have to buy the most expensive brands, but rather look for known reputable brands. Trusted brands formulate their additives with concentrated detergents that aggressively break down deposits.

Famous manufacturers do not take the risk of reducing concentration for the sake of few extra dollars at the end the month as they know well that reputation worth more than that.

What should I do?

Look for known brands, if you are not familiar with the name, check if they are old in the market (google search should usually be enough). Read review online if available, or ask the mechanic about it

Do Fuel Additives Improve Fuel Economy?

Yes, top Fuel additives may help improve fuel economy but only if your expectation are realistic!

If you expect fuel consumption to fall to half the value, then no you will not get the results you desire. Fuel additives remove dirt and sludge from the engine to enhance fuel economy. Original fuel consumption is the best you can get with additives. Often, you will notice improvements around 5% after few days.

What is Grease? Guide to Grease and its Characteristics

Posted on March 18, 2025April 7, 2025 by Armor Lubricants

What Is Grease?

Grease is a semi-solid lubricant used to protect machinery and mechanical components from friction, wear, and corrosion. Unlike liquid lubricants, grease remains in place, providing long-term lubrication in environments where frequent reapplication is impractical.

It is widely used in industries such as automotive, manufacturing, construction, and marine, where extreme conditions demand a lubricant that resists water, contaminants, and high temperatures.

Grease consists of three main components: base oil, thickener, and additives. Base oil, usually mineral or synthetic, provides the fundamental lubricating properties. Thickeners give grease its consistency and acts like a sponge, holding the oil in place while allowing it to be released gradually. Additives enhance specific characteristics such as extreme pressure resistance, anti-corrosion properties, and oxidation stability.

The ratio of these components determines grease performance. Higher base oil content makes grease more fluid, while an increased thickener percentage results in a firmer consistency.

Read More: This informative blog post provides a brief Base Oil SN 150.

Basic Definition of Grease

Grease is a semi-solid lubricant composed of a base oil, thickener, and additives. It provides long-lasting lubrication, resists leakage, and adheres well to surfaces, making it ideal for applications where liquid lubricants might not stay in place.

Key Components of Grease

Base Oil: Determines lubrication properties and can be mineral, synthetic, or bio-based.
Thickener: Gives grease its consistency and acts like a sponge to hold the base oil. Common types include lithium, calcium, and polyurea.
Additives: Enhance performance by improving oxidation resistance, wear protection, and extreme pressure handling.

Difference Between Oil and Grease in Lubrication

Both oil and grease serve as lubricants, but they differ in composition, application, and performance characteristics.

Key Differences

Feature	Oil	Grease
State	Liquid	Semi-solid
Composition	Base oil + additives	Base oil + thickener + additives
Application	Moving parts, high-speed machinery	Bearings, joints, sealed components
Viscosity	Lower viscosity, flows easily	Higher viscosity, stays in place
Maintenance	Requires frequent reapplication	Offers longer-lasting lubrication
Contaminant Protection	Less effective in sealing out dirt and moisture	Forms a protective barrier against contaminants

Why Use Grease Over Oil in Certain Applications?

Grease is preferred over oil in many applications where long-lasting lubrication, better adhesion, and contamination resistance are crucial. Unlike oil, grease stays in place, making it ideal for components that operate under heavy loads or harsh conditions.

Key Advantages of Grease Over Oil

Longer Lubrication Intervals: Grease retains lubrication properties for extended periods, reducing the need for frequent reapplication. This is especially beneficial for hard-to-reach components.
Better Adhesion and Stay-in-Place Properties: Unlike oil, which can leak or drip, grease sticks to surfaces.
Improved Contaminant Protection: Grease acts as a sealant, preventing dust, dirt, and moisture from reaching critical moving parts.
Effective in Heavy-Load and Slow-Speed Applications: Bearings, joints, and bushings under heavy loads benefit from grease’s ability to withstand extreme pressure without breaking down.
Performs Well in Extreme Conditions: Grease remains effective in high temperatures, water exposure, and vibration-heavy environments, where oil may thin out or get washed away.

Grease Properties and NLGI Classification

Grease consistency and performance vary based on thickener type, base oil viscosity, and additives. The National Lubrication and Grease Institute (NLGI) classifies greases into nine grades (000 to 6) based on their penetration value and consistency.

NLGI Consistency Grades and Their Properties

NLGI grades determine how grease performs in different applications based on consistency and penetration values. Softer greases, such as NLGI 000 to 1, offer better pumpability and are ideal for low-temperature environments and centralized lubrication systems.

Medium consistency greases, particularly NLGI 2 and 3, are widely used in automotive and industrial applications. Harder greases, ranging from NLGI 4 to 6, provide superior sealing properties.

NLGI#	Penetration (Tenths of mm)	Consistency	Food Analogy
000	445 – 475	Fluid	Cooking Oil
00	400 – 430	Semi-Fluid	Applesauce
0	355 – 385	Very Soft	Brown Mustard
1	310 – 340	Soft	Tomato Paste
2	265 – 295	“Normal” Grease	Peanut Butter
3	220 – 250	Firm	Vegetable Shortening
4	175 – 205	Very Firm	Frozen Yogurt
5	130 – 160	Hard	Smooth Pâté
6	85 – 115	Very Hard	Cheddar Cheese

Learn about lubricant additives, purpose, types, functions and benefits in this informative blog post.

Grease Performance Specifications (ASTM D4950)

Standard Classification and Specification of Automotive Service Greases (ASTM D4950) defines performance categories for chassis and wheel-bearing greases:

LA, LB – Chassis greases
GA, GB, GC – Wheel-bearing greases
GC-LB – Meets the highest standards for both chassis and wheel bearings

What Are the Different Types of Grease? their Characteristics

Grease formulations vary based on their thickener type, base oil, and additives. Each type serves specific applications depending on operating conditions, load capacity, and temperature resistance.

1. Lithium Grease

A versatile, high-performance grease made with lithium soap thickener and mineral or synthetic base oil. It is widely used in automotive, industrial, and household applications.

Composition

Thickener: Lithium soap
Base Oil: Mineral or synthetic
Additives: Anti-wear agents, corrosion inhibitors

Characteristics

Lithium Grease
Characteristics	Applications
High-temperature resistance (up to 130–150°C)	Bearings and bushings in industrial equipment
Excellent water resistance	Conveyor systems and assembly lines
Good mechanical stability	Electric motors and mechanical components
Multipurpose application	Agricultural equipment for long-term lubrication

2. Calcium Grease

A water-resistant grease made with calcium-based thickener, mainly used in marine, agricultural, and industrial applications.

Composition

Thickener: Calcium soap
Base Oil: Mineral
Additives: Anti-rust and anti-wear agents

Characteristics

Calcium Grease
Characteristics	Applications
Superior water resistance	Marine equipment (rudders, winches, propeller shafts)
Good rust and corrosion protection	Farm machinery operating in muddy conditions
Moderate temperature tolerance (up to 90°C)	Food processing equipment (non-toxic variants available)
Not suitable for high-speed applications	Construction machinery exposed to moisture

3. Lithium Complex Grease

An advanced version of lithium grease with higher temperature tolerance and extreme pressure (EP) properties. Used in automotive, heavy machinery, and industrial bearings.

Composition

Thickener: Lithium complex
Base Oil: Mineral or synthetic
Additives: Extreme pressure (EP) and anti-wear agents

Characteristics

Lithium Complex Grease
Characteristics	Applications
High-temperature resistance (up to 260°C)	Steel mills and mining equipment
Excellent load-bearing capacity	Heavy-duty bearings in industrial machinery
Good water resistance	Automotive wheel bearings and suspension components
Multipurpose, ideal for heavy-duty applications	Hydraulic presses and forging machines

4. Polyurea Grease

A non-soap grease commonly used in electric motors, industrial equipment, and long-life applications.

Composition

Thickener: Polyurea
Base Oil:: Mineral or synthetic
Additives:: Antioxidants, anti-wear agents

Characteristics

Polyurea Grease
Characteristics	Applications
Superior high-temperature performance	Electric motor bearings in HVAC systems
Long service life	Industrial pumps and compressors
Good oxidation stability	Textile and paper manufacturing machines
Not compatible with other grease types	Robotics and automation systems

5. Aluminum Complex Grease

A high-performance grease designed for food processing, marine, and high-temperature applications.

Composition

Thickener: Aluminum complex
Base Oil: Mineral or synthetic
Additives: Corrosion inhibitors, anti-wear agents

Characteristics

Aluminum Complex Grease
Characteristics	Applications
High-temperature resistance (up to 230°C)	Food and beverage processing equipment (NSF H1 variants)
Excellent water resistance	Bakery ovens and industrial furnaces
Good adhesion properties	Marine components and ship maintenance
Suitable for food-grade applications	Pharmaceutical and cosmetics machinery

6. Sodium Grease

A soap-based grease with high mechanical stability, mainly used in wheel bearings and industrial machinery.

Composition

Thickener: Sodium soap
Base Oil: Mineral
Additives: Anti-wear agents

Characteristics

Sodium Grease
Characteristics	Applications
Good mechanical stability	Wheel bearings in industrial vehicles
High dropping point	Gearboxes in machinery and power plants
Poor water resistance	Railway components and track lubrication
Limited corrosion protection	Steel rolling mills and turbines

7. Bentonite (Clay-Based) Grease

A non-melting grease designed for extreme high-temperature applications such as kilns and furnaces.

Composition

Thickener: Bentonite clay
Base Oil: Mineral or synthetic
Additives: Oxidation inhibitors

Bentonite (Clay-Based) Grease
Characteristics	Applications
Withstands extreme heat (above 250°C)	Kilns and foundries
Non-melting properties	Glass manufacturing plants
Good shear stability	Steel forging and metal casting equipment
Poor water resistance	Aircraft engine components

8. Molybdenum Disulfide (Moly) Grease

A heavy-duty grease containing molybdenum disulfide, ideal for high-load and shock-load applications.

Composition

Thickener: Lithium or lithium complex
Base Oil: Mineral or synthetic
Additives: Molybdenum disulfide, anti-wear agents

Molybdenum Disulfide (Moly) Grease
Characteristics	Applications
Superior load-bearing capability	Excavators, bulldozers, and loaders
Reduces friction and wear	Mining drills and crushers
Performs well under extreme pressure	Railway couplings and suspension systems
Common in mining, construction, and heavy-duty machinery	Off-road and military vehicle joints

Final Thoughts

Understanding grease and its characteristics is essential for machinery maintenance and smooth operation. Whether you’re dealing with high temperatures or heavy loads, this quick guide will help you select the right grease for your specialized application.

For high-grade grease solutions, Armor Lubricants offer greases at the best prices in UAE designed to meet diverse automotive and industrial applications. Explore the best quality grease products and find the perfect grease to keep your machinery running smoothly.

What Happens if You Use Diesel Engine Oil in a Gas Engine?

Posted on March 14, 2025March 11, 2025 by Armor Lubricants

Yes, you can use diesel oil in a gas engine if it meets the required API specifications and viscosity for your vehicle. Categorizing motor oils into Diesel and Petrol oils depends basically on specifications. When the spec part works for both of them, we can say it is ok!

According to API (American Petroleum Institute) classifications, API “C” categories are for diesel and API “S” categories are for gasoline. Both classifications are not compatible, but when the motor oil is designed to meet both then it is fine.

Armor Lubricants produce multi purpose engine oils designed for both gasoline and diesel engines. Designed and tested to ensure they have balanced additives and detergents to provide wear protection while preventing excessive deposits in gasoline engines.

In this informative blog post, you will find a brief history of the American Petroleum Institute.

Can I Safely Use Diesel Oil In Gas Engines?

Yes, it’s safe as long as it is compatible with API specifications.

Using diesel oil in a gas engine is possible, but it depends on the oil’s specifications and your vehicle’s requirements. Dual use is safe when oil oils meet both diesel (API “C”) and gasoline (API “S”) standards.

API Ratings and Compatibility

Engine oils are classified by the American Petroleum Institute (API) into categories for gasoline (S-series) and diesel (C-series) engines.

Dual-Rated Engine Oils: Some oils carry both API C and API S ratings, meaning they are designed for both types of engines. If the oil meets the API SN PLUS or SP specification, it is safe for use in gasoline engines.
Check Your Vehicle Manual: Always verify the API rating recommended for your gas engine before using diesel oil.

Additive Package

Additives are used to enhance properties of motor oils. Cleanliness, oxidation, and even heat resistance are affected by the used additives. multi purpose engine oil are normally designed to fulfill the needs of both engines without compromising either of them.

SYNTHETIC VS. CONVENTIONAL

Both synthetic and conventional oils are available for gasoline and diesel engines, offering different levels of performance and protection. The difference lies in their base oil composition, which affects quality but not compatibility.

Availability in Engine Oils

Synthetic and conventional oils are produced for both gasoline and diesel engines.
Engine oils can be fully synthetic, synthetic blend, or conventional, depending on the refining process and additives used.
Both types are formulated to meet API specifications, ensuring they work in compatible engines.

Quality Differences, Not Compatibility

The main distinction between synthetic and conventional oil is performance, not compatibility.

Synthetic Oil: Offers superior oxidation resistance, thermal stability, and wear protection. It flows better in cold temperatures and lasts longer between oil changes.
Conventional Oil: Provides basic lubrication and protection but may break down faster under extreme conditions.

When Should I Use Diesel Oil In My Gas Engine?

Using the right engine oil for your engine is always the best choice. Gasoline engines perform best with engine oils designed specifically for them, ensuring proper lubrication, fuel efficiency, and emissions system protection.

However, if you need one engine oil for both gasoline and diesel engines, look for dual-rated engine oils. These oils meet both API S (gasoline) and API C (diesel) classifications, making them safe for use in both engine types.

Choosing the Right Multi-Purpose Engine Oil

Check for API dual ratings (e.g., API CK-4/SN).
Select the correct viscosity recommended by your vehicle’s manual.
Use trusted brands like Armor Lubricants, which formulate high-quality oils for mixed fleets.

For long-term engine health, always choose an oil that matches your engine’s specific requirements.

What is the difference between gas engine oil and diesel engine oil?

Gasoline and diesel engine oils share the same basic components—base oils and additives—but their formulations differ to meet the specific demands of each engine type. Key differences include emissions compatibility, viscosity, and additive content.

Impact on Emissions and Catalytic Converters

Gasoline engines rely on catalytic converters to reduce toxic emissions. Certain oil additives, like Zinc Dialkyldithiophosphate (ZDDP), can harm these systems by reducing their efficiency over time.

Gas Engine Oil: Formulated with lower ZDDP levels to protect catalytic converters.
Diesel Engine Oil: Contains higher anti-wear additives, which diesel exhaust systems are designed to handle but can damage gasoline vehicle emissions systems.

Viscosity Differences

Viscosity plays a crucial role in engine protection, especially during cold starts and high-temperature operation. Diesel engine oils are typically thicker due to the high-pressure conditions in diesel engines.

Gas Engine Oil: Usually available in lower viscosity grades (e.g., 5W-30, 0W-20) for better fuel efficiency and cold-start protection.
Diesel Engine Oil: Often comes in higher viscosity grades (e.g., 15W-40, 10W-30) to withstand extreme loads but may cause heat buildup and poor pumpability in gasoline engines.

Discover if 10W30 diesel Oil is a perfect choice or big mistake in this informative blog post.

Additive Levels and Engine Cleanliness

Diesel engines generate more soot and combustion byproducts, requiring stronger detergents and acid-neutralizing additives. However, excessive detergents can negatively affect gasoline engine performance.

Gas Engine Oil: Balanced detergent levels to maintain cleanliness without affecting engine seals.
Diesel Engine Oil: High detergent levels designed to handle soot but may cause compression loss in gasoline engines by disrupting the seal between rings and cylinder walls.

Troubleshooting Small Engine Problems Easy Tips

Posted on March 10, 2025March 8, 2025 by Armor Lubricants

You start searching for Common Small Engine Problems when you try to use your lawn mower, chainsaw, or generator and suddenly it is not working! I’ve been there and believe me it can ruin your day!

You are probably reading this article because you are in this situation, and therefore i will guide you to find the best fix. I will also help you avoid getting in this situation in the future.

Differences Between Small Engines and Car Petrol Engines

Many thinks about why small engines breaks down more often than car’s engine. It seems weird when you do not know how different both of these engines. Similarities are present between small engines and car petrol engines, but they differ in design, performance, and application.

Engine Size and Power

Small engines are compact and designed for low-power applications. Typically range from 25cc to 750cc, making them ideal for lawnmowers, generators, and motorcycles.

Car petrol engines, in contrast, start at around 1000cc and can exceed 6000cc, providing significantly more power for heavier vehicles.

Fuel and Combustion Process

Most small engines operate on a simpler carbureted fuel system, while modern car petrol engines use fuel injection technology for efficient combustion.

Cooling System

Small engines rely on air cooling, which dissipates heat using fins and natural airflow.

Car petrol engines, however, use a liquid cooling system with radiators and coolant, allowing better heat management for prolonged operation.

Tips for Troubleshooting a Small Engine that won’t Start

Owning machines like mower or generators teaches you that it is not that hard to determine why your small engine isn’t working!

Small engines are simple, and most issues can be fixed without a professional mechanic. If your engine refuses to start, checking a few key components can help diagnose the problem.

Inspect the Spark Plug

A faulty spark plug often prevents the engine from starting. Check for signs of wear, cracks, or carbon buildup on the electrode.

Replacing a damaged spark plug usually resolves ignition issues. Using a spark plug tester helps determine if the plug is still functioning. If no spark appears at the terminals, installing a new one is necessary.

Clean the Carburetor

A clogged carburetor disrupts the air-fuel mixture, causing startup problems. Old fuel can leave sticky residue, blocking fuel flow. Using a carburetor cleaner removes minor clogs, but severe buildup may require a rebuild or replacement. Keeping the carburetor clean improves engine performance and reliability.

Check the Compression System and Valves

Compression leaks affect power delivery in small engines. Piston, valves, and rings control airflow and fuel movement. Damaged piston rings or leaking valves reduce engine efficiency, making startup difficult.

Examine the Ignition Coil

The ignition coil supplies voltage to the spark plug. A defective coil prevents proper ignition, stopping the engine from starting. Testing the coil’s continuity with a multimeter helps confirm if it needs replacement. Replacing a faulty coil restores ignition function.

How to Avoid Common Small Engine Problems?

Small engines power a variety of equipment, from lawn mowers to snow blowers. Preventative maintenance helps keep them running properly and reduces the need for repairs.

Buy High-Octane Fuel Specified for Small Engines

Small engines perform best with non-ethanol fuel. Ethanol can degrade rubber fuel lines and gaskets if left sitting in the carburetor for long periods. Checking the owner’s manual for fuel recommendations prevents improper fuel use, which may cause engine damage.

Learn how the right engine oil prevents engine damage and save your money in this informative blog post.

Buy Only Enough Fuel to Last a Month

Gasoline degrades within 30 days, forming varnish and gum deposits that clog fuel passages. Purchasing only the amount needed for a month prevents stale fuel from affecting performance. Keeping fuel fresh reduces carburetor issues and ensures clean combustion.

Use Fresh Gas

Closing the inline fuel shut-off valve after using the equipment allows the carburetor to run dry, reducing the chances of stale fuel buildup. Reopening the valve before the next use keeps the engine ready to start without trouble.

Use a Fuel Additive

Adding a fuel stabilizer helps prevent corrosion and deposits. Stabilizers keep fuel fresh for up to 12 months, making them essential for equipment stored between seasons. Using an additive every time the tank is refilled enhances fuel system cleanliness.

Prepare Your Small Engine for Seasonal Storage

Before storing a small engine for the season, drain the fuel from the tank and carburetor to prevent stale fuel from clogging components. Changing the engine oil while the engine is warm allows for more complete drainage. Following the owner’s manual for oil recommendations keeps internal parts properly lubricated.

Avoid Storing Equipment Outside

Leaving power equipment exposed to rain or snow leads to water contamination and corrosion. Storing it in a garage or shed extends its lifespan. If indoor storage isn’t an option, covering equipment with a durable tarp helps protect it from the elements.

Routine maintenance and proper fuel management prevent most small engine problems. Following these simple steps keeps your equipment running properly and minimizes repair costs.

Motor Oil Guide: How to Choose and Use It Correctly

Posted on March 7, 2025April 7, 2025 by Armor Lubricants

What is Motor Oil?

Motor Oil is the first shield of defense engines have! Keeping your motor function for long times would be impossible without motor oil.

What Is in Motor Oil?

Motor oil consists of base oils and additives that work together to protect the engine and enhance its performance. The base oil, which makes up 70-90% of the formula, while additives are added to enhance performance provide extra protection.

Engine oil quality and specifications starts from base oil. Lubrication is determined by the ability of the motor oil to reduce friction. Additives role is to improve efficiency partially therefore, the main rule always is

High-quality lubrication starts with the finest base oil.

Base oils are classified into:

Conventional
Synthetic
Synthetic blends (Semi-Synthetic)

Conventional oils are refined from crude oil and provide basic lubrication. Labs are the source of Synthetic oils. Both synthetic and conventional oils share a similar chemical foundation, but their physical properties set them apart. Molecular structures differences influence viscosity, temperature resistance, and overall car engine protection. Impurities on the other hands also affects how well

Motor Oil Additives

Additives enhance motor oil by optimizing lubrication, reducing wear, and maintaining engine cleanliness. They improve the oil’s thermal stability, viscosity, and resistance to breakdown under extreme conditions.

Detergents: Prevent deposit buildup and neutralize acidic byproducts from combustion.
Anti-wear Agents: Minimize metal-to-metal contact by forming a protective barrier on surfaces.
Viscosity Modifiers: Maintain oil consistency across temperature extremes. Polymers like olefin copolymers and polyisobutylene expand and contract with temperature changes, preventing excessive thinning in heat and thickening in cold conditions.
Antioxidants: Slow down oil oxidation, which can lead to sludge and varnish formation.
Dispersants: Keep contaminants like carbon, soot, and microscopic metal particles suspended in the oil, preventing sludge formation.

The precise blend of base oils and additives determines an oil’s performance in different engines and operating conditions. High-quality formulations provide superior protection, reduce maintenance costs, and extend engine life.

Essential Functions of Motor Oil

Motor oil does more than just lubricate an engine—it plays a vital role in ensuring smooth operation and longevity. Its carefully engineered formulation supports multiple functions that keep an engine running efficiently.

Minimize Friction

A thin film of oil coats moving parts, reducing friction and wear between metal surfaces. This prevents excessive heat buildup and mechanical damage, ensuring smoother performance and longer engine life. Advanced formulations with molybdenum disulfide or boron compounds enhance friction reduction, especially in high-stress applications.

Clean

Motor oil plays a crucial role in keeping the engine clean by removing and suspending dirt, carbon deposits, and combustion byproducts. These contaminants can accumulate over time, leading to reduced performance and potential engine damage.

Where Does Dirt Come From?

Dirt and contaminants enter the engine from multiple sources:

Air Intake: Dust, pollen, and debris from the environment can enter through the air filter, especially if it’s clogged or damaged.
Combustion Process: Fuel and oil burning inside the engine produce carbon deposits and soot, which can stick to internal components.
Metal Wear Particles: Over time, engine components naturally wear down, releasing microscopic metal shavings into the oil.
Residual Oil Breakdown: Old or overheated oil degrades, forming sludge and varnish that stick to engine parts.

Effects of Dirt and Deposits

Blockages in Oil Passages: Contaminants can clog small oil channels, restricting proper lubrication and leading to increased wear.
Increased Friction and Heat: Sludge buildup on moving parts reduces lubrication efficiency, causing overheating and potential engine failure.
Corrosion and Wear: Acids and debris in dirty oil accelerate metal corrosion, shortening engine lifespan.

Cool

By absorbing and dissipating excess heat, motor oil prevents overheating and thermal breakdown. It carries heat away from friction points and transfers it to the oil pan, where it is released. High-performance synthetic oils with ester-based formulations provide superior thermal stability for extreme conditions.

Act as a Dynamic Seal

Oil forms a thin seal between the piston rings and cylinder walls, improving combustion efficiency by preventing fuel and air leakage. Proper sealing ensures maximum power output and reduces emissions. Polymer-based viscosity modifiers help maintain this sealing effect across varying temperatures.

Dampen Shock

During combustion and sudden load changes, engine components experience shock forces that could cause damage. Motor oil cushions these impacts by providing a fluid barrier, reducing stress on bearings and other sensitive parts. Phosphorous-based anti-wear agents enhance this protective function.

Protect Against Corrosion

Corrosion is a serious threat to engine components, reducing efficiency and leading to costly repairs. Motor oil contains anti-corrosion additives that prevent metal surfaces from deteriorating due to exposure to moisture, acids, and oxidation.

Effects of Corrosion on the Engine

Weakened Metal Components: Corrosion slowly eats away at metal surfaces, weakening parts such as pistons, bearings, and crankshafts, which can lead to mechanical failure.
Increased Friction and Wear: Rust and corrosion create rough surfaces, reducing lubrication effectiveness and causing excessive friction between moving parts.
Oil Contamination: Corroded metal particles mix with the oil, forming sludge and abrasive debris that further accelerates engine wear.
Reduced Fuel Efficiency: Corrosion in fuel injectors or intake valves disrupts airflow and fuel combustion, lowering engine performance and increasing fuel consumption.
Potential Engine Seizure: Severe corrosion can lead to internal parts sticking together, preventing the engine from running properly or even causing complete failure.

How Motor Oil Prevents Corrosion

Motor oil contains Zinc Dialkyldithiophosphate (ZDDP) and alkylated diphenylamines, which neutralize acids and create a protective barrier on metal surfaces. These additives prevent oxidation and moisture from causing rust, ensuring that the engine remains in top condition even under harsh conditions. Using high-quality oil with strong anti-corrosion properties extends engine life and reduces maintenance costs.

Transfer Energy

In hydraulic systems and certain engine components like variable valve timing (VVT) systems, motor oil serves as a medium for energy transfer. It helps operate mechanisms by transmitting hydraulic pressure, ensuring proper engine function and efficiency.

A high-quality motor oil formulation balances all these functions, offering maximum protection, efficiency, and performance in modern engines.

Viscosity Meaning?

Viscosity refers to a fluid’s resistance to flow. In motor oil, it determines how easily the oil moves through the engine and coats its components. A high-viscosity oil is thicker and flows more slowly, while a low-viscosity oil is thinner and flows more easily.

Is Thinner Oil Always Better?

Not necessarily. While low-viscosity oil flows faster and reaches engine components quickly, it may not always provide sufficient protection. High-viscosity oil, on the other hand, forms a thicker protective film, which is beneficial in high-load or high-temperature conditions.

Too Thin: If the oil is too thin for the engine’s requirements, it may fail to create a strong enough barrier between moving parts, leading to increased wear and potential damage under high stress.
Too Thick: If the oil is too thick, it may not circulate quickly enough in cold starts, causing delayed lubrication and increased resistance, which reduces fuel efficiency.

Why Is Viscosity Important?

Lubrication Efficiency: Proper viscosity ensures that engine parts remain coated with oil, reducing friction and wear.
Temperature Stability: Oil must flow smoothly at low temperatures while maintaining thickness at high temperatures to provide protection.
Oil Film Strength: The right viscosity maintains a protective layer between metal surfaces, preventing direct contact and minimizing damage.

The right viscosity allows an engine to perform efficiently, preventing excessive wear and thermal breakdown under different operating conditions.

SAE viscosity grades (oil weights)

SAE (Society of Automotive Engineers) viscosity grades classify motor oil based on its flow characteristics at different temperatures. These grades help determine which oil is best suited for specific engines and operating conditions.

How SAE Viscosity Grades Work

Motor oil is assigned a single-grade or multi-grade rating based on its behavior in cold and hot conditions:

Single-Grade Oils: These oils, such as SAE 30 or SAE 40, have a fixed viscosity and do not adjust to temperature changes. They are mostly used in older engines or specialized applications.
Multi-Grade Oils: The most common type, multi-grade oils (e.g., 5W-30, 10W-40) contain viscosity modifiers that allow them to flow well in cold temperatures while maintaining thickness at high temperatures. The “W” stands for winter, indicating the oil’s cold-temperature performance.

Choosing the Right SAE Viscosity Grade

Selecting the correct oil weight or oil grade depends on engine requirements, climate, and driving conditions:

Cold Climates: Lower viscosity at low temperatures (lower “W” number) helps with easier startups and better lubrication in freezing conditions.
Hot Climates: Higher viscosity at operating temperatures ensures the oil remains thick enough to protect engine components under extreme heat and heavy loads.
Manufacturer Specifications: Automakers recommend specific SAE grades for each engine to provide the best balance of fuel efficiency, protection, and performance. We recommend you put the oil recommended in owner’s manual

Oil Classification

Motor oils are classified based on performance standards, composition, and application, ensuring they meet the needs of different engines and operating conditions. These classifications are established by organizations such as the API (American Petroleum Institute), ACEA (European Automobile Manufacturers’ Association), and ILSAC (International Lubricants Standardization and Approval Committee).

API Classification

The API classification system categorizes oil into two main type of oil:

S-Series (Service Category) – Designed for gasoline engines. Examples include API SP, SN, and SM, where each newer category offers better protection against wear, deposits, and sludge formation.
C-Series (Commercial Category) – Developed for diesel engines. Examples include API CK-4, CJ-4, and CI-4, which focus on handling higher loads, soot control, and thermal stability.

ACEA Classification

The ACEA system is widely used in Europe and includes categories for different engine types:

A/B Series: Covers gasoline (A) and light-duty diesel (B) engines, such as ACEA A3/B4, known for high-performance protection.
C Series: Designed for modern engines with emission control systems, such as ACEA C3, which offers low-SAPS (Sulfated Ash, Phosphorus, and Sulfur) formulations.
E Series: Used for heavy-duty diesel engines in commercial vehicles, such as ACEA E9, which provides extended drain intervals and high-temperature stability.

ILSAC Classification

ILSAC works closely with API to develop fuel-efficient motor oils for modern gasoline engines. Common categories include:

GF-6A: Improves fuel economy while providing protection against wear and deposits.
GF-6B: Designed for low-viscosity oils (e.g., 0W-16) to enhance fuel efficiency without sacrificing protection.

Why Oil Classification Matters

Choosing the right classification ensures the oil meets engine requirements, enhances performance, and extends engine life. Always refer to the manufacturer’s recommendations to select the best oil for a specific car.

The right motor oil is essential for maintaining engine health and performance. Understanding oil grades, API classifications, and oil change intervals helps ensure your car runs smoothly in all conditions.

Example of Engine Oil to Analyze Type

As you can see in the following image, we have a plastic can of Engine oil. Now let’s explain its properties based on the spec found on the label.

Fully Synthetic: Made from fully synthetic base oils Group IV
API: SP Following the latest standards specified by American Petroleum Institute in May 2020. Suitable for any vehicle type manufactured after 2020 (you can use this oil also for older models, but older APIs are more affordable.)
0W40: High number indicates it is best for your car in hot weather.
100% Virgin Base Oil: Made only from high quality premium virgin oil. Recycled oils are not used to manufacture this motor oil

Using the best performance engine oil extends the life of your car, improves fuel efficiency, and prevents costly repairs. Whether you need full synthetic, conventional, or high-mileage oil, selecting the correct oil grade ensures better performance and engine longevity.

Essential Points

This motor oil guide has covered the basics for beginners. Selecting the right motor oil doesn’t have to be confusing. Understanding the difference between synthetic and conventional oils and about oil grades is crucial for your engine to run smoothly and efficiently for years to come. This motor oil guide serves as a foundation for continued learning, and as you gain knowledge, will save you money and prevent potential engine problems.

5w30 instead of 5w20 What Happens If You Use a Different Grades of Engine Oil

Posted on March 4, 2025April 7, 2025 by Armor Lubricants

Impact on Engine Performance

SAE grades or ACEA grades are there for a good reason which is to maintain best performance. Not following recommendation affects performance on both long and short term.

Increased Engine Wear and Friction

Using different grades of engine oil different from the manufacturer’s recommendation can significantly impact wear and friction inside the engine. A higher viscosity oil than required may not flow efficiently through narrow oil passages, especially in modern engines with tight tolerances. This reduced flow can leave critical components under-lubricated, increasing metal-on-metal contact and accelerating wear.

On the other hand, a lower viscosity oil than recommended may fail to create a strong protective film between moving parts. Under high loads or extreme temperatures, the engine oil can thin out too much, reducing its ability to prevent bearing and cylinder wall damage. Over time, improper lubrication leads to excessive engine wear and costly repairs.

Poor Cold-Start Protection

Cold starts are when an engine experiences the most stress, as engine oil is thickest when the temperature is low. If the engine oil is too thick, it takes longer to reach

valvetrain components, bearings, and cylinder walls, increasing wear during startup. High-viscosity oil may also struggle to reach turbocharger bearings, potentially leading to oil starvation and failure in turbocharged engines.

Conversely, a lower viscosity oil may flow quickly but might not provide adequate cushioning for high-pressure components. This can result in increased camshaft and piston ring wear, especially in high-performance or heavy-duty applications. Cold weather performance is highly dependent on oil viscosity, making the right engine oil grades essential for long-term engine durability.

Reduced Fuel Efficiency

Engines are designed to operate with specific engine oil viscosity to minimize internal resistance and pumping losses. Using a thicker oil than recommended forces the engine to work harder to pump and circulate the oil, leading to higher fuel consumption. Increased drag from excess viscosity affects overall efficiency, especially in vehicles designed for low-friction, fuel-saving technologies.

A thinner oil may reduce resistance, but it could also lead to poor sealing between piston rings and cylinder walls. Incomplete sealing allows blow-by gases to escape, reducing engine compression and overall efficiency. The wrong engine oil grades can disrupt the balance between lubrication, cooling, and fuel economy, negatively affecting both performance and longevity.

Potential Long-Term Damage

Engine damage due to change is not immediate, for some time you will not see any difference. Clear effect will start to appear later on things like fuel consumption, or engine torque.

Oil Pressure Issues

Using the wrong engine oil viscosity grades can create serious oil pressure imbalances, affecting engine performance and durability.

Thicker oil than recommended may raise oil pressure, but it can also limit flow to critical components like valve lifters, camshaft lobes, and turbo bearings. This can cause uneven lubrication, increasing wear in certain areas.
Thinner oil than required may lower oil pressure, reducing the ability to maintain a stable lubricating film. Under high loads or high temperatures, oil pressure may drop too much, causing engine knocking, premature bearing wear, and even oil starvation.

Engines with variable valve timing (VVT) systems rely on precise oil pressure to adjust camshaft timing. Using the wrong viscosity can interfere with VVT solenoid operation, leading to rough idling, poor acceleration, and reduced efficiency.

Sludge Buildup and Deposits

Oil viscosity plays a crucial role in maintaining engine cleanliness. The wrong engine oil grades can lead to increased sludge formation and carbon buildup, which restricts oil flow and reduces efficiency.

Thicker-than-recommended oil may not circulate efficiently, trapping contaminants and increasing the risk of sludge accumulation in oil passages, piston rings, and valve train components.
Thinner oil than required can break down faster under high temperatures, leading to oxidation and the formation of varnish-like deposits on internal engine parts.

Engines with turbochargers are particularly vulnerable to oil deposits. The wrong viscosity grade can lead to oil coking in the turbo bearings, reducing efficiency and potentially causing turbo failure over time.

Increased Engine Temperature

Oil serves as both a lubricant and a coolant, helping to dissipate heat generated by combustion and friction. Using the incorrect viscosity can compromise temperature regulation, leading to overheating and long-term engine damage.

Thicker oil creates more resistance within the engine, leading to higher internal temperatures. Excessive heat accelerates oil degradation, reducing its ability to lubricate effectively.
Thinner oil may fail to provide adequate thermal protection, causing excessive friction and wear on high-load components such as crankshaft bearings and camshaft lobes.

Engines designed for specific oil grades depend on proper heat dissipation to prevent gasket failures, piston scoring, and premature wear of metal surfaces. Long-term use of the wrong viscosity increases the likelihood of oil breakdown, leading to higher maintenance costs and potential engine failure.

When is it OK to use different grades of engine oil?

You can use 5w-30 instead of 5w-20 without damage in some cases:

Emergency Use: If 5W-20 is unavailable, 5W-30 can be used temporarily. Difference in specification is not worse than using old motor oil that is already broken down.
Older Engines: High-mileage engines with looser tolerances may tolerate 5W-30 better 510. Many mechanics advise to switch engine oil grade for older engines however we advise to ask for multiple opinions first.
Extreme Heat: In very hot climates, 5W-30 thicker oil film can offer added protection. Such measurement can be taken after consulting with your mechanic.

The Bottom Line

Understanding different grades of engine oil is crucial to keep your car engine running smoothly. Choosing the right engine oil grade, like 5W-20 or 5W-30, affects how your engine works. Using the wrong engine oil grade impacts engine performance. Check manufacturer’s recommendation to find the best engine oil for your vehicle.

If you’re looking for high-performance engine oil, consider Armor Lubricants. We offer range of engine oil in UAE to meet different needs. Our engine oils are formulated for high protection and high performance. Interested in becoming a distributor for our high quality top-branded engine oil product from Armor Lubricants, We welcome lubricants traders, spare parts traders, fleet operators, and workshop owners to join our network.