Originally Posted By B5 Bee
Since higher octane fuel generally has less energy per gallon


Since that is an incorrect statement I'd say any conclusions derived from it would be incorrect as well.

Gasoline has the same amount of energy per gallon, regardless of octane.

All octane levels do is affect detonation and/or preignition.

Assuming nothing different other than octane levels you will see nothing changed.

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Don't be the exception.