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The octane rating tells you how resistant fuel is to premature detonation, i.e. burning before it's meant to. It's quite a long explanation, depending on how much you already know. The short answer is that high octane fuel allows you to fire the spark plug closer to the optimal point during the compression stroke to allow the engine to perform at its best. ...


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For an engine, there is a specific peak pressure that it can withstand, which is limited my the mechanical stress limit of the components of the engine parts. This peak pressure is in direct relation to the compression ratio of the engine and the octane rating of the fuel. The compression ratio of the engine stays constant. With a low Octane rating, there ...



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