Classification of Automotive Diesel Engine Oil?

1 Answers
LeJosie
07/29/25 2:30pm
Diesel engine oil grades are broadly categorized into: CA, CB, CC, CD, CE, CF, CF-4, CG-4, CH-4, CI-4, CJ-4. Below is expanded information on diesel engine oil classifications: 1. Different grades of diesel engine oil indicate varying oil quality levels and corresponding suitable vehicle types. This means that the further the letter in the sequence, the higher the oil quality grade, and so on. The highest grade of diesel engine oil is: CJ-4. 2. Diesel engine oil grade specifications: The English letter 'C' at the beginning represents diesel engine oil. The further the letter in the sequence, the higher the oil quality grade. Generally, CD-grade oil is sufficient for diesel engines. 3. Turbocharged diesel engines require higher-quality oil, typically CF-4, where '-4' indicates that the oil is suitable for four-stroke diesel engines.
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