Differences Between SL and SN?

[Jayden]

There are three main differences between SL and SN as follows: Difference in Wear Resistance Performance: The difference in oxidation resistance and wear resistance performance under high-temperature and high-speed operating conditions, such as the same TEOSTMHT high-temperature deposit test: The requirement for SN is no more than 35 milligrams; SN has higher high-temperature detergency than SL, making it especially suitable for turbocharged engines. SN-grade oil has higher oxidation stability and wear resistance. Since SN oil contains lower levels of phosphorus and zinc compared to SL oil, it reduces wear on the three-way catalytic converter. Different Environmental Standards for Engine Oil: In the quality classification, the further back the letter, the higher the environmental standard. Therefore, "SL" engine oil has a lower environmental standard than "SN". The highest environmental standard for engine oil is "SP". Classification by Quality Level: SG, SH, SJ, SL, SM, SN, so SN has a higher quality than SL. The number of SL-grade oils available for sale is fewer than SN.