Which is better, SN or SP engine oil?

1 Answers
NorahFitz
07/29/25 9:20pm
SP generally outperforms SN in overall performance, with improvements in areas such as noise reduction, fuel efficiency, and acceleration. Here are more details about SP and SN: 1. Phosphorus content: SP is currently the highest grade of engine oil, and its quality is relatively better. SP and SN differ in phosphorus content, with SN having relatively less phosphorus, while SP has a higher viscosity value, indicating a stronger oil film and better protection. 2. Certification: Since SP-grade oil has not yet been widely certified, most vehicles currently use SN-grade oil, which fully meets the needs of vehicle engines. The higher the grade of oil, the more expensive it tends to be.
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