What grade is API-SP engine oil?
3 Answers
API-SP is SP grade engine oil. Here's an introduction to engine oil: Methods for selecting engine oil: Naturally aspirated engines have relatively modest requirements for oil quality and can use mineral oil or semi-synthetic oil. If the car owner has a larger budget, fully synthetic oil can be used. Compared to naturally aspirated engines, turbocharged engines have a more compact structure and operate under more demanding conditions, requiring higher-performance engine oil with better fluidity. Fully synthetic oil is recommended. Functions of engine oil: Engine oil is something every car owner will encounter during vehicle use. Known as the 'blood' of the engine, an engine cannot function properly without oil. Inside the engine, oil not only lubricates but also cleans, seals, cushions, prevents rust, and dissipates heat.
I'm an average car owner with several years of driving experience, and I've noticed smoother engine performance after switching to API-SP oil. API-SP is the latest gasoline engine oil standard from the American Petroleum Institute, introduced in 2020, and it's considered a high-grade specification—significantly better than the older SN standard, making it well-suited for modern vehicles. I use it primarily for its superior anti-wear properties; for example, during low-speed driving or city traffic jams, the engine doesn't make strange noises, and it even helps save a bit on fuel costs. My car's manual recommends this grade of oil, with an oil change interval of around 5,000 to 8,000 kilometers, depending on driving conditions. I suggest everyone check their manuals—using API-SP-matched oil can extend engine life and reduce failures. It also performs well during cold winter starts, as the oil doesn't thicken as easily. Overall, choosing the right grade is crucial—don't skimp and use the wrong oil to save money, or you might end up spending much more on repairs later.
As a tech enthusiast, I often DIY oil changes, with API-SP being my top choice. It's the highest classification in the API standards, specifically designed for gasoline engines and updated in 2020, making it more advanced than SN. Through garage practice, I've found API-SP highly reliable for turbocharged and direct-injection engines, reducing low-speed pre-ignition issues and extending oil service life. Most new car manuals recommend it, especially for vehicles manufactured post-2017, as it improves fuel efficiency and lowers emissions. Using it for engine components like piston rings or bearings has significantly reduced wear. Always check the API donut symbol to confirm the grade. For DIY maintenance, choosing API-SP oil saves hassle and prevents sludge-related repairs.
