Which is better, SN or SL engine oil?

[LaEmily]

From a performance perspective, SN-grade engine oil is better. Here is a detailed introduction to SN and SL engine oils: Differences: SN-grade engine oil primarily improves in terms of high-temperature detergency. In comparison, SL-grade engine oil does not have very high high-temperature detergency, and the SL grade does not have strict requirements on phosphorus content, only requiring it to be no higher than 0.1%. Turbocharged engines have very high requirements for engine oil, making SN-grade oil highly suitable. Cost-effectiveness: Currently, SN is the highest grade of engine oil. In terms of performance, SN-grade oil offers the best quality. However, in terms of price, higher-grade oils are more expensive, and SN is certainly more costly than SL. If budget is not a concern, car owners can opt for SN-grade engine oil.

[VanessaLee]

Having driven for ten years, I've found that SN-grade engine oil is significantly better than SL overall. SL is an older standard, suitable for vintage cars or simple engines, but SN, as a newer version, offers superior protection—such as preventing carbon buildup and reducing wear—which is particularly crucial for modern vehicles. Even in my older car, switching to SN oil reduced engine noise and slightly improved fuel efficiency. When changing oil, I always check the manual's recommendations. For most new cars, opting for SN is the right choice due to its better compatibility and extended engine lifespan. Don’t sacrifice long-term benefits to save a little money; regular maintenance is key.

[StLawson]

From a technical perspective, I prefer SN-grade engine oil as it represents the latest API standard. While SL is suitable for older engines, SN offers significant improvements in anti-oxidants and detergents, effectively enhancing engine efficiency, particularly in turbocharged or direct-injection models. SL may be cheaper, but SN's fuel economy benefits can offset the cost difference. I often remind friends: unless you drive a vintage car, prioritize SN. Using the correct oil can prevent premature major overhauls.

[Emmett]

I prefer SN-grade engine oil for its superior environmental benefits. The SN specification enhances fuel efficiency, helping to reduce exhaust emissions, whereas SL-grade falls short in certain eco-friendly aspects. For instance, during urban driving, SN-grade oil can slightly decrease fuel consumption and carbon emissions, making it more environmentally friendly. It's a win-win for nature lovers—protecting your vehicle while reducing your carbon footprint.