What does A3B4 mean for engine oil?
2 Answers
A3B4 refers to the grade of engine oil. Here are the detailed explanations: 1. 'A' indicates engine oil for gasoline engines; 'B' indicates engine oil for diesel engines; the number following the letter represents the grade of the oil, with a higher number indicating a higher grade; A3B4 engine oil means it can be used in both gasoline and diesel engines. 2. Engine oil is very important for the engine, often referred to as the 'blood' of the engine. Without engine oil, the engine cannot operate normally. 3. Besides lubrication, engine oil also plays roles in cleaning, sealing, buffering, rust prevention, and heat dissipation. 4. During engine operation, the oil forms a thin film inside the engine, preventing direct contact and friction between components, thus protecting the engine. 5. Without engine oil, components would directly contact and create friction during operation, generating excessive heat instantly, which can severely damage the engine. 6. Overheating in the engine can lead to knocking, which reduces engine power and increases fuel consumption.
While researching motor oil, I discovered that A3B4 is a crucial standard originating from the European ACEA classification. 'A' represents high-performance requirements for gasoline engines, while 'B' denotes light-duty diesel engines. This specification of oil is suitable for modern turbocharged vehicles, maintaining high viscosity at high temperatures to effectively reduce engine wear and deposit formation, while also extending component lifespan. Unlike conventional oils that thin out easily, using the wrong type may cause engine burning. I believe related standards like API and SAE viscosity are equally important. For instance, commonly used 5W-30 oil products often bear the A3B4 marking, indicating compliance with stringent testing standards. It's advisable to check your vehicle's maintenance manual to confirm requirements – don't compromise by using lower-grade oil that could damage expensive components.
