What is the Difference Between 92 and 95 Octane Gasoline?

[AmyLynn]

92 octane gasoline and 95 octane gasoline differ mainly in the proportion of heptane and isooctane they contain. The specific differences are as follows: Composition Difference: 92 octane gasoline consists of 92% isooctane and 8% heptane, while 95 octane gasoline consists of 95% isooctane and 5% heptane. The primary difference lies in the purity of isooctane—the higher the purity, the stronger the gasoline's anti-knock properties. Stability Difference: 95 octane gasoline has excellent stability, but it burns more easily than 92 octane gasoline. The octane rating of 92 octane gasoline is 90%, whereas that of 95 octane gasoline is 95%. Applicable Vehicle Difference: When choosing between 92 and 95 octane gasoline, always follow the vehicle's manual. Generally, lower-end cars can use 92 octane gasoline, while higher-end cars require 95 octane gasoline to meet engine demands.