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Fuel octane?

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Old 2/21/11, 01:48 PM
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Fuel octane?
I have a 1966 Mustang GT "A" code. I was wondering what fuel grade others are using. I use 87 octane. Any thoughts?
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Old 2/21/11, 05:50 PM
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if it works well with 87 there`s no reason to go higher
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Old 2/21/11, 08:02 PM
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It could knock, but if it doesn't then it should be OK?
Last edited by Falchion; 2/21/11 at 08:04 PM.
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Old 2/24/11, 01:03 PM
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I use 87.. no problems.
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