What are the effects of using 95 octane fuel in a car designed for 92 octane?

1 Answers
MatteoRose
07/30/25 3:32am
Using 95 octane fuel in a car designed for 92 octane may lead to incomplete combustion, resulting in insufficient power and increased carbon deposits. Below are detailed explanations of the impacts of improper fuel selection: 1. Using 95 octane fuel in a 92 octane car: The octane rating is too high, and the engine's compression ratio is insufficient, leading to incomplete combustion. Over time, this can cause carbon deposits in the combustion chamber and waste fuel. 2. Using 92 octane fuel in a 95 octane car: The engine's high compression ratio combined with insufficient octane purity can cause knocking, affecting power output and resulting in reduced performance. This also increases engine wear. Always choose fuel based on your car engine's specified compression ratio standard.
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