What Type of Gasoline Should a Regular Family Sedan Use?

[StBarrett]

Domestic sedans generally have a compression ratio above 9, and it is recommended to use 92 or 95 octane gasoline. The differences between 92 and 95 octane gasoline are as follows: Different anti-knock properties: The gasoline octane rating represents anti-knock performance, with higher numbers indicating better anti-knock capability. Different isooctane content: 92 octane gasoline consists of 92% isooctane and 8% n-heptane, while 95 octane gasoline is composed of 95% isooctane and 5% n-heptane. The slightly higher price of 95 octane gasoline is due to its higher proportion of isooctane. Price difference: A tank of 95 octane gasoline is slightly more expensive than 92 octane gasoline.