Can I Use 92 Octane Gasoline After Using 95 Octane?

1 Answers
DiKing
07/29/25 1:08pm
It is not advisable to use 92 octane gasoline after using 95 octane. If the owner's manual indicates that the minimum octane requirement is 92, then using 95 octane is acceptable; however, if it specifies 95 octane, you should not use 92 octane. Below are relevant details: 1. The main difference between 92 and 95 octane gasoline lies in the ratio of n-heptane and isooctane. 92 octane gasoline contains 92% isooctane and 8% n-heptane, while 95 octane gasoline contains 95% isooctane and 5% n-heptane. 2. The octane rating does not indicate the purity or quality of the gasoline. In fact, the octane rating only reflects the gasoline's resistance to knocking (its octane number) and has little to do with its overall quality. If a car can use both 92 and 95 octane gasoline, it is not recommended to alternate between different octane ratings, as this may adversely affect the engine. It is best to consistently use one octane rating.
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