Ethanol has less BTU per gallon then gasoline, thats the reason for the poorer mileage. also its less dense so I'm assuming that more can get thru your carb jets per minute. I have been using Seafoam for a couple years for a stabiliser and have had good luck. only good thing about ethanol is that it picks up any water drops and lets your engine burn it rather then collecting in your fuel tank and rusting the bottom.
