Which is better, SL or SN engine oil?
1 Answers
SN engine oil is better than SL. Relevant details are as follows: 1. Reason: In China, engine oils are classified according to the API standard. Currently, SN is the highest grade of engine oil. From SA to SN, the later the letter after S, the higher the grade. Compared to SL grade, SN grade has a wider temperature adaptation range and better protection capabilities. Currently, most fully synthetic engine oils on the market are of SN grade. There are even better GT engine oils of SN grade. 2. Use: The engine is the heart of a car. Inside the engine, there are many metal surfaces that move and rub against each other. These components operate at high speeds, in harsh environments, and can reach working temperatures of 400°C to 600°C. Under such severe conditions, only qualified lubricating oil can reduce wear on engine parts and extend their service life.