What is the SP grade of engine oil?
4 Answers
SP is the highest grade of engine oil. Below are the specific details about engine oil specifications: 1. API Grade: API stands for the American Petroleum Institute, and the API grade represents the quality level of engine oil. Codes are used to describe the working capability of engine oil. The grades are classified as SA, SB, SC, SD, SE, SF, SG, SH, SJ, SL, SM, and SN, with the letter further down the alphabet indicating a higher grade. SP grade is currently the highest level of engine oil. SJ was the standard in the 1990s, SL was the standard in 2001, SM in 2004, and SN in 2010. 2. Engine Oil Grade: SP-grade engine oil, being the highest grade, generally falls under the category of fully synthetic oil. Semi-synthetic oils are usually at SL or SM grades, with some at SN grade. Among international brands, engine oil grades are mostly SF grade and above.
I used to wonder what the SP grade meant when changing engine oil, until I learned it's the latest gasoline engine oil standard by the American Petroleum Institute, representing the current highest specification. After using SP-grade oil, I noticed my car accelerates more smoothly with significantly less vibration. SP shows improvement over the older SN grade, specifically designed for modern turbocharged vehicles to prevent low-speed pre-ignition issues and avoid knocking damage to components. It enhances wear resistance and high-temperature stability, making it ideal for post-2020 vehicles like my Honda Civic, whose manual recommends SP-grade oil. Regular oil changes with this grade can extend engine life and reduce frequent repairs. At service shops, mechanics instantly recognize the label, but it's also convenient for DIY purchases—just look for "API SP" on the bottle. Overall, SP stands as the most advanced oil for daily driving.
As a car enthusiast, I'm quite familiar with SP engine oil—it's the latest gasoline engine oil grade introduced by API, updated just in 2020. SP specifically targets common issues in modern engines, such as LSPI (Low-Speed Pre-Ignition) risks, which are prevalent in turbocharged vehicles. I've tried various brands, and SP oil delivers superior lubrication, reduces deposit formation, protects piston rings and cylinder walls, and even improves fuel efficiency. When choosing engine oil, always refer to your vehicle's manual—most new gasoline SUVs and sedans are compatible with SP specifications. By the way, hybrid vehicles also use this standard because it handles high temperatures and pressures more reliably. Don't overlook specification upgrades—older SN grades might not meet the demands of newer cars. I believe SP not only enhances performance but also makes driving safer and more reassuring, representing technological progress.
When changing engine oil, I prefer to prioritize the SP grade, which is currently the highest API standard oil. SP represents a certification that better prevents engine wear, especially during frequent starts or in stop-and-go traffic. Check the oil bottle label—if it has the SP mark, it means it has passed tests for resisting low-speed pre-ignition and deposits. A practical tip is to confirm the specifications in your car's manual. Most gasoline-powered vehicles support SP, including some hybrids. If unsure, ask a repair shop or use an online tool to check compatibility. SP oil isn’t expensive, priced similarly to older standards, and the oil change interval shouldn’t exceed 5,000 miles. Regular maintenance is key—avoid prolonged use of lower-grade oils to prevent engine issues. This type of oil makes maintenance simpler and more efficient.
