It will actually burn very dirty and create a lot of carbon around the burners due to having a much higher ignition/flash point and will not completely burn. And BTW, this is the listing for all of your local ethanol-free gas pumps http://www.pure-gas.org/index.jsp?stateprov=VA
Goes to show what I know about gas. I would've thought the high octane gas would burn hotter and therefore cleaner.
My XJ loves non ethanol gas.
Around here, ethanol-free 91 is $15/gallon in five gallon drums. No lead, but no ethanol. I only use it in my pressure washers and yard equipment, too expensive for the truck.