What is the difference between engine oil A1B1 and A3B4?
2 Answers
The differences between engine oil A1B1 and A3B4 are: 1. Different grades: Engine oil A1B1 is an economical fuel with low viscosity, equivalent to API SJ grade; A3B4 is a higher-grade product, equivalent to API SL grade. 2. Different uses: Engine oil A1B1 has stable oil quality and long-lasting grade, used for gasoline engines and light-duty diesel engines with extended oil change intervals; A3B4 has stable oil quality and is designed for high-performance gasoline and direct-injection diesel engines. Engine oil, also known as engine lubricant, can lubricate and reduce friction, assist in cooling, seal and prevent leaks, prevent rust and corrosion, and provide shock absorption for the engine.
I previously used A1B1 engine oil, which focuses more on fuel efficiency. It did help save some gasoline, but it works fine only for regular small cars. When driving at high speeds or under heavy engine load, it always felt like the protection wasn't enough, potentially accelerating component wear. In comparison, A3B4 engine oil is more comprehensive, suitable for high-performance gasoline engines and even diesel engines. It provides better high-temperature stability and engine protection, delivering quicker power response and quieter operation. I recommend choosing based on your vehicle's manual—don't prioritize fuel savings at the expense of long-term maintenance. If you frequently drive long distances or own a turbocharged car, using A3B4 oil offers more peace of mind—safety is more important.
