What is the Difference Between 92, 95, and 98 Octane Gasoline?

[LeoAnn]

Petroleum 92, 95, and 98 differ in their octane ratings. The octane rating represents the gasoline's resistance to knocking (anti-knock index), with higher numbers indicating better anti-knock performance. Relevant details are as follows: 1. Brief Introduction: Gasoline octane ratings are determined by comparing the fuel to artificially blended reference fuels. These reference fuels consist of two components: isooctane (which has good anti-knock properties) and n-heptane (which has poor anti-knock properties). Gasoline that exhibits the same anti-knock performance as a reference fuel containing 92% isooctane and 8% n-heptane is classified as 92-octane gasoline. 2. Anti-Knock Performance: When the air-fuel mixture is injected into the cylinder, the piston compresses the mixture as it moves upward. As pressure increases, so does temperature. If the gasoline's anti-knock performance is too low, combustion may begin before the spark plug ignites the mixture, resulting in knocking (commonly known as engine knock). Knocking not only reduces engine output but can also cause damage to the engine.