How to Choose the Right Motorcycle Oil Grade?
1 Answers
The American Petroleum Institute (API) sets the standards, and motor oils can be classified into SA, SB, SC, SD, SE, SF, SG, SH, SJ, SM, and SN. Among these, SA is the lowest quality oil and contains no additives. As the grade increases, the oil quality gradually improves. The selection of motor oil mainly depends on the high-temperature viscosity, indicated by the 'Y' in XW/Y0. Generally, water-cooled engines use 40, while oil-cooled engines use 50.