Can Sinopec 95 and PetroChina 95 be mixed?
1 Answers
92 gasoline and 95 gasoline cannot be mixed because their isooctane content is different. 92 gasoline is suitable for low-compression engines, while 95 gasoline is suitable for high-compression engines. If 92 gasoline is added to a car that should use 95 gasoline, abnormal combustion will occur, leading to knocking. Knocking not only damages the combustion chamber but also directly affects the normal operation of the engine, and in severe cases, may cause engine damage. If 95 gasoline is added to a car that should use 92 gasoline, although it will not damage the engine, 95 gasoline is more expensive than 92 gasoline, resulting in waste. Differences between 92, 95, and 98 gasoline: Standard gasoline is composed of isooctane and n-heptane. Isooctane has good anti-knock properties, and its octane number is defined as 100; n-heptane has poor anti-knock properties and is prone to knocking in gasoline engines, so its octane number is defined as 0. If the gasoline is labeled as 92, it means that the gasoline has the same anti-knock properties as standard gasoline containing 92% isooctane and 8% n-heptane. The same principle applies to 95 and 98 gasoline. How to handle adding the wrong gasoline: If the gasoline added has a higher octane number than the car's specified gasoline, for example, adding 95 gasoline when 92 is specified, you can simply switch back to 92 gasoline after the current fuel is consumed. If the gasoline added has a lower octane number than the car's specified gasoline, for example, adding 92 gasoline when 95 is specified, you only need to add a high anti-knock fuel additive. Of course, you can also directly drain the fuel and refill with 95 gasoline. To find out which gasoline your car should use, you can refer to the car's user manual or check the fuel grade marked on the fuel tank cap.
