Does Mixing 92 and 95 Octane Gasoline Affect the Car?
1 Answers
92 octane gasoline and 95 octane gasoline should not be mixed because they have different iso-octane contents. 92 octane gasoline is suitable for engines with low compression ratios, while 95 octane gasoline is suitable for engines with high compression ratios. If 92 octane gasoline is added to a car that requires 95 octane, abnormal combustion may occur, leading to engine knocking. Knocking not only damages the combustion chamber but also directly affects the engine's normal operation, and in severe cases, it may cause engine damage. Conversely, if 95 octane gasoline is added to a car that requires 92 octane, it won't harm the engine, but since 95 octane is more expensive, it would be a waste. Differences between 92, 95, and 98 octane gasoline: Standard gasoline consists of iso-octane and n-heptane. Iso-octane has good anti-knock properties, with an octane rating of 100, while n-heptane has poor anti-knock properties and is prone to knocking in gasoline engines, with an octane rating of 0. If gasoline is labeled 92, it means this gasoline has the same anti-knock properties as standard gasoline containing 92% iso-octane and 8% n-heptane. The same principle applies to 95 and 98 octane gasoline. How to handle adding the wrong gasoline: If gasoline with a higher octane rating than required is added (e.g., adding 95 octane when 92 octane is specified), simply use up the fuel and refill with 92 octane gasoline afterward. If gasoline with a lower octane rating than required is added (e.g., adding 92 octane when 95 octane is specified), you can add a high anti-knock fuel additive. Alternatively, you can drain the fuel tank and refill with 95 octane gasoline. To determine the correct gasoline for your car, refer to the vehicle's user manual or check the fuel grade marked on the fuel tank cap.
