What is the Difference Between CH and CF Engine Oils?
1 Answers
The differences between CH and CF engine oils lie in their application scope, grade, performance, emission standards, and price. Below are the detailed explanations: Different Application Scopes: CF is suitable for high-speed, four-stroke, naturally aspirated or turbocharged diesel engines; CH is used for high-speed, four-stroke diesel engines that comply with the 1998 U.S. emission standards and use fuel with a sulfur content below 0.5%. Different Grades: Diesel engine oils start with the letter 'C,' and the grades are CA, CB, CC, CD, CE, CF, CF-4, CG-4, CH-4, CI-4, CJ-4. Each subsequent letter represents a higher quality grade, meaning CH-grade oil is superior to CF-grade. Different Performance: With each increase in the oil quality grade, the performance improves over the previous one. Whether it's the stability of the oil (detergency and dispersancy) or the protection of the engine (corrosion resistance and oxidation resistance), CH-grade oil outperforms CF-grade. Different Emission Standards: CH-4 has higher emission standards than CF-4. Different Prices: Since CH engine oil offers better performance and a longer service life compared to CF engine oil, it is also more expensive. Engine oil is an essential item for every car owner. Inside the engine, it not only lubricates but also cleans, seals, cushions, prevents rust, and dissipates heat. It is often referred to as the 'lifeblood' of the car. Engine oil consists of base oil and additives. Over time, all performance aspects of engine oil degrade, so it needs to be replaced regularly. Prolonged use without changing the oil can accelerate engine wear. When selecting engine oil, consider the following: Choose oil based on the engine's requirements. There's no need to use high-grade oil in engines with lower requirements, nor should you use low-grade oil in engines with higher demands. Opt for multi-grade oil whenever possible. Multi-grade oil is economical, long-lasting, and efficient, providing better engine protection. Due to its characteristics, multi-grade oil may appear darker and have lower oil pressure compared to conventional oil, which is normal.
