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What is the SP grade of engine oil?

1 Answers

Janelle

07/29/25 4:13pm

Engine oil SP represents the quality grade of engine oil. The quality level, the difference between engine oil SN and SP lies in the thickness or thinness (phosphorus content) of the oil at a certain temperature, with SN oil having relatively lower phosphorus content. Moreover, comparing the viscosity of SN and SP oils, SP has a slightly higher viscosity value, indicating that SP's oil film is stronger than SN's, providing better protective performance. Below is more detailed information: 1. SG, SJ, SL, SM, and the subsequent SP are all grades of gasoline engine oil, with SP being the highest grade currently available for gasoline engine oil. The higher the grade of the engine oil, the better its various technical indicators, which can significantly extend the engine's lifespan, prolong oil change intervals and maintenance cycles, and reduce vehicle maintenance costs. 2. SM engine oil can meet daily usage needs, while M-grade oil offers better oxidation resistance, deposit control capabilities, and superior anti-wear protection, ensuring fuel economy and long-lasting performance. 3. If you frequently drive in congested urban environments, you may opt for higher-grade engine oil, which is relatively more environmentally friendly and economical. Choose based on your specific travel needs and avoid blindly pursuing higher-grade oil to prevent excessive wear and tear on the engine due to prolonged intensive operation.

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