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Is it OK to use regular gasoline in a high-compression engine?
Wiki User
∙ 11y ago
My advice is to use exactly what the manufacture recommends on any older car. Using 87 octane in an engine that requires 91 octane will cause pre-detonation (pinging) and will eventually cause engine damage on older vehicles. On newer vehicles where the manufacture says, premium fuel recommended you can use 87 octane fuel. The fuel management system will adjust for the lower octane fuel. You will have a slight loss of power but no other problems. On vehicles were the manufacture say's premium fuel required you must use premium or you will damage the engine over time.
Wiki User
∙ 11y ago
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The engine fuel management system will adjust for the lower octane fuel. This will cause you to have less power and your fuel mileage may suffer. If you hear any pinging whatsoever from the engine switch back to the premium fuel immediately or you will have engine damage. If no pinging occurs you can use regular.
