What model of engine oil is used for diesel engines?
3 Answers
Diesel engines use engine oil of model 10W-40 or 10W-30. The following is a detailed introduction about the functions of engine oil: 1. Lubrication: Engine oil is one of the important components in car maintenance. The engine forms an oil film through the engine oil to provide lubrication. 2. Reduce friction: It changes dry metal friction into liquid friction between oil layers, reducing friction resistance and minimizing wear on components. 3. Cooling: Engine oil also serves functions such as cooling, cleaning, sealing, rust prevention, and eliminating impact loads. Additional information: When the car's engine oil is insufficient, the car's dashboard usually lights up an icon—the engine oil pressure warning light—to alert the owner of insufficient oil. When the owner notices low oil levels, it is essential to promptly replenish the vehicle with the appropriate engine oil.
Oh, the topic of diesel engine oil selection is quite important. Based on my experience, choosing the right oil depends on several key factors, such as viscosity grade. Common ones include 15W-40 or 5W-40—the 'W' stands for winter performance, where a lower number is better for cold regions to ensure quick starts, and the '40' represents high-temperature thickness for engine protection. API service categories also matter, like CJ-4 or CK-4, which are designed for modern diesel engines to reduce soot and wear. Different vehicle conditions affect the choice—for example, when I drove an older car, using low-quality oil led to higher fuel consumption and strange noises, so I recommend checking the owner’s manual first, as it specifies the matching type. In terms of brands, Mobil or Castrol diesel engine oils are good, but I avoid buying no-name brands to prevent engine damage. Don’t forget environmental factors—thicker oil in summer prevents overheating, while thinner oil in winter eases cold starts. In short, choosing the right oil can extend engine life and save money. If unsure, I suggest consulting a professional at a repair shop.
As a young person driving a diesel SUV daily, I've found that oil selection directly impacts driving pleasure. Personally, I prefer 15W-40 oil for its versatility and balanced performance across seasons, especially in keeping the engine quiet and stable during long trips. But weather matters—in northern winters, it's best to switch to 5W-40 to avoid cold-start difficulties and engine wear. Another factor is vehicle age: my old pickup runs better with high-viscosity oil like 20W-50, while newer models need lower viscosity to meet emission standards. I check API certifications like CK-4 online for compatibility and warn against cheap, low-quality oils that can cause fuel consumption spikes or warning lights. The key is trying different brands to find your match and maintaining regular checks—a healthy engine means smoother drives and savings.
