MARATHON is the most commonly ethanol-free gasoline. But that website can only be a generalization,as the stations are many times allowed to buy it at their discretion. The test for ethanol in fuel is really easy, so I'll pass it along,maybe post it up separately too?
(1) Get some gas in a clean ,empty gas can.
(2) Put whatever amount you want in it. Go home, get a clean,clear, dry glass container(quart canning jar is GREAT),and put a few ounces of water in the container.
(3) Set the container on the floor of the garage or level outside surface and mark the water's level with a black magic marker.
(4) Add maybe a pint of gasoline or more if container will hold it.
(5) If gas contains ethanol,you'll see the water level rise above the mark you made.The more it rises,the higher the ethanol content.
(6)BTW,this is a painstaking way of removing ethanol from gasoline,but you might also remove a fuel additive,so if you do it,add a touch of gas treatment to the final product. don-ohio
^)