Is There a Big Difference Between Using 92 and 95 Octane Gasoline for Motorcycles?

[DiMolly]

Motorcycles should use gasoline with an octane rating that matches their engine's compression ratio. Generally, engines with a compression ratio above 9.5:1 are suitable for 95 octane gasoline. For motorcycles with lower compression ratios, using higher octane gasoline offers no benefits. The specific differences between 92 and 95 octane gasoline are as follows: Different Compositions: The purity of isooctane varies between the two. 92 octane gasoline consists of 92% isooctane and 8% n-heptane, while 95 octane gasoline consists of 95% isooctane and 5% n-heptane. Different Stability: 95 octane gasoline has excellent stability and is easier to burn. The octane rating of 92 octane gasoline is 92%, while that of 95 octane gasoline is 95%. 95 octane gasoline is particularly easy to burn. Different Power Output: 95 octane gasoline, with its higher octane rating, is suitable for engines with higher compression ratios. In such engines, as the operating speed increases, the ignition timing inside the cylinder advances. When the speed reaches a critical point, the air-fuel mixture may ignite prematurely before the spark plug fires, a phenomenon known as knocking. Increasing the octane rating of gasoline effectively enhances its resistance to knocking.