The Difference Between 92 and 95 Octane Gasoline

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92 and 95 octane gasoline differ in the following ways: 1. Different power: The octane rating of gasoline represents its anti-knock performance, with a higher number indicating better anti-knock capability. 95 octane gasoline, which has a higher octane value, is suitable for engines with higher compression ratios. This is because, as the engine speed increases, the ignition timing in the cylinder advances more. When the speed reaches a critical point, the fuel-air mixture in the cylinder may ignite prematurely before the spark plug fires, a phenomenon known as knocking. Increasing the octane value of gasoline can effectively enhance its anti-knock performance. 2. Different isooctane content: 92 octane gasoline consists of 92% isooctane and 8% n-heptane, while 95 octane gasoline is made up of 95% isooctane and 5% n-heptane. The slightly higher price of 95 octane gasoline is due to its higher proportion of isooctane. 3. Different prices: A tank of 95 octane gasoline is slightly more expensive than a tank of 92 octane gasoline.