What grade of gas do you run in your ATV?
and less power, less mileage/efficiency..any cooling you think is just a thought, there simply isn't enough alcohol in the fuel at 10% to do a thing. Don't tell me your one of those guys that runs AV fuel or race fuel when you goto the track with your stock daily driver...you should know as much as any go fast guy how this octane stuff actually works LOL93 octane with startron additive.
trying to find non ethanol around here is like trying to find leaded fuel. it aint gonna happen.
reason for running higher octane is it runs cooler, smoother and hell its only a few cents more.