Does Mixing 95 and 92 Octane Gasoline Have Any Impact?
1 Answers
92 octane gasoline and 95 octane gasoline should not be mixed, as 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 gasoline, it may cause abnormal combustion, leading to engine knocking. Knocking not only damages the combustion chamber but also directly affects the normal operation of the engine, potentially causing severe engine damage. On the other hand, if 95 octane gasoline is added to a car that requires 92 octane gasoline, it won't damage the engine, but since 95 octane gasoline is more expensive than 92 octane, it would be a waste. Differences between 92, 95, and 98 octane gasoline: Standard gasoline is composed of iso-octane and n-heptane. Iso-octane has good anti-knock properties, with its octane rating set at 100; n-heptane has poor anti-knock properties and is prone to knocking in gasoline engines, with its octane rating set at 0. If the gasoline is labeled as 92 octane, it means the 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 the gasoline added has a higher octane rating than what the car requires—for example, adding 95 octane when the car requires 92 octane—simply use up the gasoline normally and then refill with 92 octane gasoline. If the gasoline added has a lower octane rating than what the car requires—for example, adding 92 octane when the car requires 95 octane—you can add a high anti-knock fuel additive. Alternatively, you can drain the fuel tank and refill it with 95 octane gasoline. To determine the correct gasoline for your car, refer to the vehicle's user manual or check the fuel octane rating labeled on the fuel tank cap.
