No name brand non-ethanol 87 gets the best mileage for me and that is all my older vehicles get, well two of them require premium, but still, non-ethanol for them too. The newer vehicles it doesn't matter, any 87 will do. I dump some Techtron in now and then and have never had a fuel related problem. When I am away from home and traveling, I stick to the places that sell the top tier stuff, or hit a Pilot, Flying J, etc.