Diesel Engine Oils
Engineered to handle the high pressures and soot of diesel engines, our oils provide superior protection for everything from heavy-duty trucks to modern turbo-diesel SUVs.
Eiffel Vista Extreme 15W-40 Full Synthetic Diesel Engine Oil CK-4/SN 5L
Eiffel Opera Ultimate C3 5W30 Full Synthetic Engine Oil SN/CF - 20L
Eiffel Vista Extreme SAE 15W-40 CK-4/SN Mineral Diesel Engine Oil - 20 L
Eiffel Vista Titanium 15W-40 CI-4/SL Semi-Synthetic Diesel Engine Oil – 20L
Eiffel Vista Extreme 15W40 CK-4/SN Semi-Synthetic Diesel Engine Oil - 20 L
Eiffel Marvela Xtreme 10W-40 CK-4/SN Fully Synthetic Diesel Engine Oil – 20L
Eiffel Fabela Xtreme 5W-30 CK-4/SN Full Synthetic Diesel Engine Oil – 20L
Eiffel Vista Extreme 15W-40 CK-4/SN Full Synthetic Diesel Oil – 20L
Eiffel Vista Extreme SAE 15W-40 CK-4/SN Full Synthetic Diesel Engine Oil - 205 Litre Drum
Eiffel Marvela Xtreme 10W40 Full Synthetic Diesel Engine Oil CK-4/SN - 205L
Eiffel Vista Titanium 15W40 Semi-Synthetic Diesel Engine Oil CI-4/SL - 205 Litre Barrel
Eiffel Vista Extreme 15W-40 CK-4/SN Mineral Diesel Engine Oil - 205 Litre Drum
Eiffel Vista Extreme 15W40 Semi-Synthetic Diesel Engine Oil CK-4/SN - 205 Litre Drum
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Always wanted to try premium synthetic oils but never knew where to start. The product guides on Eiffel Lubricants were super helpful! They gave me the confidence to choose the right oil for my car. Thanks for making it easy!
John Davis
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A Guide to Diesel Engine Oil
Diesel engines are built for torque and durability, but they operate under much higher pressures and create different byproducts than their petrol counterparts. This means they require a specialized engine oil with a unique formulation to keep them protected. Using a standard petrol engine oil in a diesel engine can lead to premature wear and costly damage.
What Makes Diesel Engine Oil Different?
Diesel engine oil is specifically engineered to handle the tough environment inside a diesel engine. It has a different additive package designed to perform several critical jobs:
- Soot Control: Diesel engines naturally produce more soot during combustion. Diesel oil contains high levels of detergents and dispersants. These additives are designed to capture and suspend soot particles, preventing them from clumping together to form damaging sludge.
- Acid Neutralization: The combustion process, especially with diesel fuel, can create acidic compounds. Diesel oil has a higher Total Base Number (TBN), which means it has a greater capacity to neutralize these acids and protect engine components from corrosion.
- Enhanced Wear Protection: The high compression ratios in diesel engines put immense pressure on bearings and other internal parts. Diesel oil is formulated to have a stronger film strength and contains more robust anti-wear additives to withstand these forces.
Understanding Diesel Oil Viscosity (e.g., 15W-40 vs 5W-30)
Like all oils, diesel engine oil comes in different viscosity grades. The right one depends on your engine type and operating climate.
- 15W-40: This is the classic workhorse. It is the most common grade for heavy-duty trucks, agricultural machinery, and older diesel engines, providing excellent protection under heavy loads.
- 5W-40 & 10W-40: These full synthetic or semi-synthetic oils offer better cold-start performance and are often used in modern light-duty diesel trucks and high-performance engines.
- 5W-30: This lower-viscosity oil is commonly specified for the latest generation of diesel engines in passenger cars and SUVs, especially those equipped with Diesel Particulate Filters (DPFs), to help maximize fuel efficiency.
What Do API Ratings Like CK-4 Mean?
The American Petroleum Institute (API) certifies diesel engine oils with a 'C' rating (for 'Compression'). The letter that follows indicates the performance level, with later letters representing newer, more advanced specifications. For example, API CK-4 oils are designed for the latest high-speed diesel engines and are formulated to protect modern emissions control systems.
Always consult your vehicle's owner's manual for manufacturer-specific recommendations.