Since there seems to me some experts on gas and ethanol on here, I figure I'll ask the question here.
First of all, I am not a fan of e10. And I live in one of those god forbidden states that do NOT require it to be labeled on the pump. So we have no Idea wether it is ethanol free or E10.
Based on my experience, I really cant tell a difference between 100%gas and e10 in my ~15MPG truck. But I can tell a hugh differece in by ~40MPG saturn. When I use gas I KNOW to be ethanol free, I get 41-42MPG. When I fill up at a place that uses e10, it knocks me down to 36-37MPG
An I have heard a ton of horror stories about e10 in small engines like chainsaws and weedeaters. Especially the older ones which I have a lot of. We always try to find ethanol free PREMIUM gas for all our 2-stroke stuff.
So that brings me to the question, I called the local marathon and asked them if they run ethanol free gas and she said yes that ALL marathon gas is ethanol free. I conldn't really find anything online to confirm this so do any of you guys know for sure???