What grade is CK engine oil?
1 Answers
CK-4 belongs to the high-grade engine oil. Here are the specific details about engine oil grades: 1. C represents diesel engine oil: From CA, CB, CC, CD, CE, CF, CF-4, CG-4, CH-4, CI-4, to CJ-4, the further the letters are in the alphabet, the higher the quality grade of the oil. Generally, CD-grade oil is used for diesel engines, while turbocharged diesel engines require higher-quality oil. The -4 indicates that the oil is suitable for 4-stroke diesel engines. 2. S represents gasoline engine oil: API engine oils are divided into two categories. The S-series represents oils for gasoline engines, with specifications including SA, SB, SC, SD, SE, SF, SG, SH, SJ, SL, SM, and SN. When both S and C letters are present, it means the oil is suitable for both gasoline and diesel engines. SN-grade is currently the highest-grade engine oil. SJ was the standard in the 1990s, SL in 2001, SM in 2004, and SN in 2010.