Can a Corolla switch from 95 to 92 octane fuel?

1 Answers
DeSara
07/30/25 9:57am
A Corolla that has been using 95 octane fuel can switch to 92 octane. However, it is recommended to use up the remaining gasoline in the tank before refilling with 92 octane. Additionally, it is advisable to perform a fuel system cleaning and replace the fuel filter at around 30,000 kilometers. Compression Ratio: During the design phase of an automobile engine, the fuel octane rating is determined based on the compression ratio. The compression ratio is a crucial structural parameter of the engine, representing the ratio of the gas volume when the piston is at the bottom dead center (start of compression) to the gas volume when the piston is at the top dead center (end of compression). Compression Ratio Guide: Engines with a compression ratio between 7.5 and 8.0 should use 90-93 octane gasoline; those with a ratio between 8.0 and 8.5 should use 90-93 octane; a ratio between 8.5 and 9.0 requires 93-95 octane; and a ratio between 9.5 and 10.0 should use 95-97 octane. These specifications are clearly detailed in every vehicle's manual, so it is essential to read the manual carefully when you purchase a new car.
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