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What is the difference between CH oil and CI oil?

1 Answers

OHannah

07/29/25 1:06pm

Here are the differences between CH oil and CI oil: 1. Different grades: The first letter of diesel engine oil is "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 of oil. In other words, the CI grade is higher than the CH grade. 2. Different performance: With each increase in the oil quality grade letter, the performance is superior to the previous one. Whether it is the stability of the oil (detergency and dispersancy) or the protection performance for the internal engine (anti-corrosion and anti-oxidation), CI grade oil is better.

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