Difference Between 97 and 98 Octane Gasoline

1 Answers
OJessica
07/25/25 1:39am
Compared to 97 octane, 98 octane gasoline has a higher anti-knock index (RON) by one octane unit. Increasing the octane number of 97 octane unleaded gasoline by one unit requires greater technical difficulty and higher processing costs. The higher the octane rating, the stronger the anti-knock performance. What people generally consider as "purer" and better is mainly reflected in the gasoline's anti-knock properties. The applicable ranges for different octane ratings are as follows: 1. 90 octane gasoline: Suitable for vehicles with engine compression ratios between 7.5 and 8.0. 2. 93 octane gasoline: Suitable for vehicles with engine compression ratios between 8.0 and 8.5. 3. 97 octane gasoline: Suitable for vehicles with engine compression ratios between 8.5 and 9.5.
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