Will mixing 95 and 92 gasoline affect the car?
2 Answers
95 gasoline cannot be directly mixed with 92 gasoline, which will affect the car. The introduction of the two gasolines is as follows: 95 gasoline: It contains 95% isooctane and 5% n-heptane. High-octane gasoline should be used when the engine compression ratio is high. If low-octane gasoline is used with a high compression ratio, it will cause abnormal combustion, resulting in knocking, increased fuel consumption, and lack of power. Of course, high-compression engines can also use low-grade gasoline, but you should not blindly choose gasoline grade based on compression ratio. Instead, follow the manufacturer's requirements for refueling. 92 gasoline: 92 gasoline has an octane rating of 92 and contains 8% n-heptane, which is suitable for mid-range cars (with relatively low compression ratios).
I've been driving for years and often hear people ask about this. Mixing 95-octane gasoline with 92-octane in your car actually depends on what fuel your vehicle requires. If the engine is designed for 95-octane, using 92 may cause knocking—unusual noises and severe shaking in the engine—which could damage components like pistons or spark plugs over time. Blending fuels slightly lowers the octane rating, potentially causing poor fuel system performance and increased consumption. An occasional mix isn’t a big deal, such as adding a bit of 92 when the tank is nearly empty as a temporary measure, but don’t make it a habit. I always recommend checking the owner’s manual to confirm the manufacturer’s recommended fuel grade—sticking to that is safest. Car maintenance requires attention to detail; don’t risk saving a few bucks at the potential cost of higher repair bills and worse driving performance. If you accidentally use the wrong fuel, try to burn through that tank quickly and refill with the correct type.
