Re: Probably ruined my new 78 Pinto, but in what way...?

Thomas Smith /
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Premium fuel did nothing to contribute to the issue you're having. Premium fuel doesn't burn hotter, it has a higher resistance to pre-ignition (which is useful in high compression performance ignitions). The reason most mopeds recommend regular fuel is that they don't have a high enough compression to require high octane fuel. Do a compression test.

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