What is the difference between engine oil A1B1 and A3B4?
4 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.
The main differences between A1B1 and A3B4 lie in performance and applicability. A1B1 leans more towards fuel economy, suitable for certain regular gasoline engines but not for diesel or high-performance vehicles. A3B4 offers a higher level of protection, capable of handling high-temperature conditions, and is widely used in turbocharged engines or diesel vehicles. From a personal perspective, my experience tells me that using the wrong oil can shorten engine life, and choosing the right one is essential to maintain smooth power. Checking the vehicle manual is key, and don't confuse the differences between the two to avoid unnecessary repairs.
Choosing engine oil depends on standards. A1B1 is optimized for fuel efficiency, suitable for urban vehicles, while A3B4 is better for high-demand engines like diesel or performance models. After using A3B4, my engine noise reduced significantly and performed more stably under high temperatures. The difference is clear in protection—using the wrong type may cause malfunctions. Always refer to the manual for the safest choice.
