What are the diesel engine oil grades?
3 Answers
Diesel engine oil grades are: ca, cb, cc, cd, ce, cf, cf-4, cg-4, ch-4, ci-4, cj-4, etc. The functions of engine oil are: 1. To alleviate friction and high temperature; 2. To reduce gas leakage and prevent external pollutants; 3. To prevent contact between water, air, acidic harmful gases, and parts; 4. To buffer the pressure rise at the engine cylinder port; 5. To flush away dirt generated on the working surfaces of parts. The maintenance items for diesel engines include: 1. Regularly changing the engine oil and oil filter; 2. Keeping the crankcase well-ventilated; 3. Regularly cleaning the crankcase; 4. Regularly cleaning the fuel system; 5. Regularly maintaining the radiator; 6. Maintaining and cleaning the fuel system.
I've always driven diesel trucks, and the oil grade is something you really need to pay attention to, like the API CK-4 or CJ-4 standards specifically designed for diesel engines. The latest CK-4 grade offers excellent protection, prevents engine carbon buildup, and also takes care of the emission system. Don’t underestimate it—using non-compliant oil for too long can even damage the turbocharger. During maintenance, I always check the oil bottle label to ensure it matches the manual’s recommendations, like the 15W-40 viscosity that suits multiple climates. Regular oil changes are a must—I do it every 5,000 km to avoid engine wear and costly repairs. There are plenty of brands on the market, and synthetic oils from Mobil and Shell tend to be more durable. Don’t skimp and buy lower-grade oil; you might even struggle to start the engine in winter. Plus, small things like checking the filter matter. Choose the right oil grade, and your truck will run smoothly for a decade—safe and cost-effective.
As an automotive DIY enthusiast, delving into diesel oil classifications is quite fascinating. Standards like API CK-4, designed for modern low-emission engines, offer top-tier oxidation resistance and cleaning performance. When selecting oil, consider SAE viscosity - for instance, 5W-30 suits cold starts, while CK-4 protects DPF systems from clogging. Different vehicle types have varying requirements; off-road or heavy-load applications demand high anti-wear grades. For maintenance, regular checks of oil pressure and color can detect issues early. Emission standards are also evolving, with new grades pairing better with low-sulfur fuels for enhanced environmental friendliness and durability. Using incorrect oil may cause valve train noise, potentially doubling repair costs. It's wiser to invest in genuine products to extend the entire powertrain's lifespan.
