Can I add 95 gasoline when there is still a little 92 left in the car?

1 Answers
CassidyDella
07/30/25 5:05am
You can add 95 gasoline when there is still a little 92 left in the car. It has little impact on the car and the engine itself, but due to the insufficiently high compression ratio design, it cannot fully utilize the characteristics of 95 gasoline, leading to stagnation and increased fuel consumption. The differences between 92 gasoline and 95 gasoline are as follows: Different anti-knock properties: The gasoline grade represents the anti-knock property, and the higher the grade, the better the anti-knock ability. Different isooctane content: 92 gasoline is composed of 92% isooctane and 8% n-heptane, while 95 gasoline is composed of 95% isooctane and 5% n-heptane. The reason why 95 gasoline is slightly more expensive is the higher proportion of isooctane. Different prices: A tank of 95 gasoline is slightly more expensive than a tank of 92 gasoline. Effects of adding high-grade gasoline to low-grade cars: Low-compression ratio engines are mostly installed in low-end cars, and most of them use 92# gasoline. If 95 or 98 gasoline is added, the higher the grade of gasoline, the better the stability, making it at least difficult for the engine to malfunction due to knocking. However, adding high-grade gasoline to a low-compression ratio engine will result in incomplete combustion of the fuel, wasting power and making it more prone to carbon deposits. If some car owners are curious about this, it's okay to try adding it a few times occasionally.
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