What is the difference between SN grade and SP grade?
2 Answers
Here are the differences between SN grade and SP grade: In terms of viscosity (phosphorus content): SN oil has relatively lower phosphorus content; and the viscosity of SP oil is slightly higher compared to SN. In terms of advantages: SP oil has a stronger oil film than SN, providing better protective performance. Additionally, SP shows stable improvements over SN in terms of noise reduction, fuel consumption, and acceleration performance. Oil usage: For most car owners, SM grade oil is sufficient for daily use. Oil performance: M grade oil offers better oxidation resistance, deposit control, and anti-wear protection, ensuring fuel economy and long-lasting performance.
I've been researching car engine oil for many years, and the difference between SN and SP grades is quite interesting. SP is the latest standard and significantly better than SN. It provides superior engine protection, especially against issues like low-speed pre-ignition, which is particularly important for modern turbocharged vehicles. There's also some improvement in fuel efficiency, helping me save on gas money and providing long-term peace of mind. In terms of compatibility, SP oil can be safely used in older vehicles specified for SN, but the reverse might not be suitable, especially for newer cars. After switching to SP, I noticed the engine runs smoother, with reduced noise and fewer sudden malfunctions. I recommend car owners prioritize using SP-grade oil, especially for newer vehicles. It's like giving your engine an upgrade, improving both performance and durability—definitely a worthwhile investment.