What is the difference between SP and SN engine oil?
3 Answers
Differences between SP and SN engine oil: 1. Different grades: SP is currently the highest grade of engine oil; SN is the second grade. 2. Oil film: SP has a stronger oil film; SN has a weaker oil film. 3. Protective performance: SP has stronger protective performance; SN has average protective performance. Below is additional information: 1. The function of engine oil: It can lubricate and reduce friction in the engine, assist in cooling, seal against leaks, prevent rust and corrosion, and provide shock absorption. 2. The relationship between base oil and lubricating oil: Base oil is the main component of lubricating oil, determining its basic properties. Additives can compensate for and improve the shortcomings of the base oil in terms of performance, giving it certain new properties.
The difference between SP and SN engine oils mainly lies in API classification and protective performance. SN is a standard introduced in 2010, focusing on reducing engine carbon deposits and emission control, suitable for most regular vehicles. I find it cost-effective for my older car. SP is the new 2020 standard with upgraded low-speed pre-ignition prevention, which is particularly important for turbocharged engines, helping to prevent knocking and wear. After switching to SP in my new car, the engine runs smoother and lasts longer. Overall, SP offers stronger cleaning properties and high-temperature protection but is slightly more expensive; SN is more versatile and suitable for budget-conscious owners. The key is to consider your engine type and manufacturing year – newer cars should prioritize SP. Regular checks of oil specifications can extend vehicle lifespan and avoid major repairs.
Let's talk about SP and SN engine oils. Both are API standards but with significant differences. SN is the older version, popular around 2010, emphasizing fuel efficiency and basic protection. I've used it several times and found it adequate for older engines. SP was updated in 2020, mainly enhancing low-speed pre-ignition protection, especially for common issues in turbocharged vehicles, and improving oxidation resistance. Through DIY testing, I've compared them and found SP performs more stably under high-temperature long-distance driving, reducing noise. Although SP costs more, it saves on long-term maintenance expenses. My suggestion is to choose SN to save money based on driving habits, while SP offers better engine protection. Don't forget to match the viscosity and follow the manual's recommendations.
