So, it seems we'll need a solution for when E15 is forced into all supplies? Not good for those that try to keep fuel on hand for tractors, etc.
Buy the E15 into containers, not directly into the vehicle(s). Pour some distilled water in and mix; the water should drop the ethanol out of solution and the water-ethanol mixture will sink to the bottom. Decant off your pure gasoline.
There are a few stations here and there that still sell pure gasoline. Harder to find, tho.