What does SP's A3/B4 mean?
3 Answers
Engine oil SP represents the quality grade of engine oil. SG, SJ, SL, SM, and the subsequent SP are all grades for gasoline engine oils, with SP being the highest grade currently available for gasoline engine oils. A3/B4 is the testing and certification standard for automotive lubricants set by the European automobile manufacturing industry. Technically, it is higher than the commonly known American API standard. Below is an introduction to related content: 1. A represents gasoline engine oils, including A1, A3, A5, etc., while B represents light-duty diesel engine oils, including B1, B3, B4, B5, etc. The higher the number, the higher the grade. 2. A3/B4 is a dual-purpose oil for both gasoline engines and light-duty diesel engines, with a relatively high grade.
As someone who frequently maintains my own car, A3/B4 in oil standards refers to the high-performance grades by API (American Petroleum Institute) for both gasoline and diesel engines. Specifically, A3 stands for high-performance gasoline engines, while B4 represents high-performance diesel engines. It provides stronger protection for the engine, reducing wear and carbon buildup under high temperatures, thereby extending engine life. Always check the manual when selecting oil—for example, my old Volkswagen specifies using A3/B4 oil to avoid malfunctions from using the wrong type. Regular oil changes are also crucial. I check the oil level monthly to ensure smooth operation.
As a DIY car repair enthusiast, I understand that A3/B4 refers to a performance rating for engine oil within the API classification system. The 'A' category applies to gasoline engines, while 'B' is for diesel engines, with the numbers 3 and 4 indicating higher grades suitable for turbocharged or high-performance engines. This type of oil improves fuel efficiency and cleanliness while preventing sludge formation. Driving my Škoda, I've noticed noticeably smoother acceleration with this oil. Don't underestimate the importance of oil selection - it significantly impacts engine longevity, so pay close attention to oil specifications during daily driving.
