Can ethanol free gas increase gas milage this much?

[Rough Edge racing]

Except you can't get around the physics.

If E10 has less energy per gallon you need to use more to do the same work as a gallon of E0 (assuming no efficiency of combustion is increased with the E10 or wasted energy with the E0).

So the adjustment would likely come at the throttle which would necessarily be opened more.

 Cruising along at 60 mph with a powerful bike the throttle is barely cracked open...Hard to say if the 5 percent less energy per gallon of E10 as compared to non ethanol fuel would be noticeable...

[Kev m]

Cruising along at 60 mph with a powerful bike the throttle is barely cracked open...Hard to say if the 5 percent less energy per gallon of E10 as compared to non ethanol fuel would be noticeable...

Well assuming all other things being equal (efficiency etc.) then of course 5% would be noticeable if someone cared to look. Whether or not the individual felt it was SIGNIFICANT would be another matter. [emoji6]

[Arizona Wayne]

I have an ethanol ?....is it only in 87 octane or in all octane levels?

[TimmyTheHog]

I have an ethanol ?....is it only in 87 octane or in all octane levels?

It should tells you on the pump whether or not it may contain up to 10% (or 15% in some area, or so I have been told) ethanol in the fuel.

Up here in Canada, we have ethanol all the way up and including 91 Octane.

The only one I know does not contain Ethanol here are Chevron 94 and Shell 93 Premium.