Which is better, SL or SP engine oil?

[LaAthena]

SP engine oil is better. SP represents the quality grade of engine oil, with SP being the highest grade for gasoline engine oils. The higher the grade of the oil, the better its various technical indicators. Below are the differences between the two grades of engine oil: Performance differences: In terms of oxidation resistance and wear resistance under high-temperature and high-speed operating conditions, as well as lubrication protection for various engine components and prevention of low-speed pre-ignition in engines, SP engine oil far surpasses SL engine oil. Environmental protection differences: In terms of environmental protection, SP engine oil contains less sulfur, phosphorus, and ash, resulting in lower exhaust emissions and less carbon buildup inside the engine during normal vehicle operation.

[VonTessa]

As a veteran driver with over 30 years of experience, I've witnessed the evolution of motor oil from SL to SP. Simply put, SP oil is far superior to SL, especially in terms of modern engine protection. Back when using SL, I often encountered carbon buildup and wear issues. But now, SP with its new additives does a better job cleaning the engine internals and preventing sludge accumulation. Moreover, SP reduces exhaust emissions, making it more environmentally friendly. If you have an older vehicle, SL might still work, but for new cars or those looking to extend their vehicle's lifespan, I strongly recommend switching to SP. Since I made the switch to SP last year, my car runs smoother, the oil change intervals have extended slightly, and I've saved quite a bit on maintenance costs. In short, from a performance standpoint, SP is an upgraded version worth the investment.

[SophiaLee]

As someone who cares about the environment, I believe SP engine oil is far superior to SL. The SP standard was implemented after 2019 with the aim of reducing pollution and improving fuel efficiency. In actual driving, SP significantly reduces harmful emissions like nitrogen oxides, making it much more environmentally friendly than the older SL standard. It's also more cost-effective for daily use, as SP's formulation enhances engine efficiency, indirectly saving you some fuel costs. Although SP is slightly more expensive, it protects engine health in the long run and reduces maintenance hassles. I recommend car owners choose SP—not just for their vehicles but also to reduce their carbon footprint. If possible, check your car's manufacturing year; newer models are better suited for SP. Don't underestimate the importance of choosing the right engine oil—it plays a crucial role in environmental protection.

[JosiahFitz]

As a mechanic with years of experience, I can confidently say that SP engine oil outperforms SL. The new additive combination in SP effectively controls engine wear and carbon buildup. During repairs, it's common to see cylinder scuffing caused by SL, but SP significantly reduces this risk. It's compatible with more modern systems, such as turbocharged engines, and can extend the lifespan of components. In practical use, SP offers more stable oil change intervals and simpler maintenance. I recommend prioritizing SP, but always check if your vehicle's manual supports it. If budget is tight, SL can serve as a temporary solution, but in the long run, SP is more cost-effective. Never overlook oil standards—small details can have a major impact on safety.