Which is better, SP or SN engine oil?

[SebastianDella]

SP engine oil is slightly better than SN. The SP grade is a newly introduced classification, and there are not many SP-certified engine oils available yet. Currently, SN engine oil still dominates most of the market. The API quality classification divides engine oils into the S series and C series. The S series is specifically for gasoline vehicles, while the C series is for diesel vehicles. When labeled with both S and C, it indicates that the oil is suitable for both gasoline and diesel vehicles. There are currently 13 types in the S series: SA, SB, SC, SD, SE, SF, SG, SH, SJ, SL, SM, SN, and SP. According to the alphabetical order, each subsequent letter represents an oil that is superior to the one before it. In other words, the further the letter is in the alphabet, the better the performance and other aspects of the engine oil.

[Desiree]

As a seasoned driver with over a decade of experience, I often encounter the issue of engine oil selection. The SP is a newly introduced API standard, which was launched in 2020 and is more advanced than SN, primarily because it contains special additives that effectively reduce engine wear, especially addressing issues like low-speed pre-ignition. If you drive a turbocharged car or frequently go on long trips, SP oil can provide stronger protection, such as preventing carbon buildup and reducing the risk of knocking. SN isn't bad either—it's the older standard, suitable for older or economy vehicles, and offers decent protection. But in my experience, SP is generally better because of its high compatibility; it works well even in older cars and can extend engine life while reducing maintenance. The key is to check the vehicle manual's recommendations and change the oil on time—don't skimp on small expenses only to incur bigger losses.

[VonClayton]

From a cost-saving perspective, I'm a pragmatist. Both SP and SN engine oils are viable options, but SP is slightly more expensive. SP is an upgraded version with higher API standards and more comprehensive protection, potentially saving you money in the long run by reducing engine issues. However, if you drive an ordinary family car mainly for urban commuting and your manual specifies SN, stick with it—SN oil offers great value for money when changed regularly. I never take long trips; my car is just a means of transport, and I've used SN for years without major repairs. If your budget allows, SP is indeed worth the investment, especially for new cars or turbocharged engines, as it can slightly improve fuel efficiency and indirectly save on gas. When choosing oil, opt for reputable brands with proper certifications—don't just focus on price.

[LeCollin]

I'm just starting to maintain my car, and the engine oil issue is quite a headache. SP is better than SN, as it's a newer standard offering more comprehensive engine protection. Simply put, SP can reduce carbon buildup and wear risks, while SN is also good but outdated. My car's manual recommends SN, but a mechanic friend said switching to SP is fine, and the engine seems to run quieter. As a beginner, don't mess around—first check the vehicle manual's requirements and use the correct viscosity like 5W-30. More expensive oil isn't necessarily better; the key is regular maintenance and fresh oil changes. Overall, SP outperforms SN, especially for modern cars, giving peace of mind.