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Originally Posted by mrlmd1
I don't think the ethanol in the gas has anything to do with carbs gumming up,
and what is the drop in gas mileage with ethanol in the gas - one or two or three mpg out of 60-65?
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You are, of course, free to think whatever you want but you are in a VERY small minority of bike riders who don't think ethanol contributes to more frequent carb gumming. It is possible that you are right and everybody else is wrong.
The drop in mileage is about what you stated.
Ethanol has about 10% less energy content than pure gas......so if you have a vehicle that runs of E-85, you would get about 10% less mileage or a LOT less power if the engine was re-tuned to try and keep the same mileage.
With E-10, the drop in energy content (and supposedly mileage) is about 3-4%.
If you were getting 60 mpg with E-0, then you should expect about 58 with E-10.
Most folks probably wouldn't notice that small a difference; in a car it's even less.
The guys who swear that they have a 10-15% drop in mileage with E-10 probably have something ELSE wrong with the bike in the first place. I haven't done a scientific survey but I think they tend to be the ones with open pipes and other "performance" mods too.