Quote:
Originally Posted by prlwpod
should make a worthwhile improvement in the way the motor runs (Higher Octane = better combustion ). You can usually buy Av gas (Aviation Fuel ) at the airport or Racing gas from a station that carries the premium stuff. Google is your friend. Good Luck.
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Sorry, but I have to disagree with this. Higher Octane in a low compression engine like you have in a Cub will actually give you less power. High Octane is used to control detonation in high compression engines.