What type of gasoline should be used for an engine with a compression ratio of 11.5:1?

[StAllison]

This compression ratio is relatively high, requiring the use of high-octane gasoline, such as 97 octane. The primary criterion for selecting gasoline grade is the engine's compression ratio, which is also a core energy-saving indicator in modern vehicles. For high compression ratio engines: 95 octane gasoline contains a slightly higher proportion of anti-knock agents compared to 92 octane. Engines with high compression ratios have greater power and higher fuel efficiency, but often lack stability, hence requiring gasoline with better anti-knock properties. The advantage of 95 octane gasoline over 92 octane lies in its higher proportion of octane in the gasoline, providing better anti-knock performance.