It all comes up the same damn pipe, gasoline is gasoline! It's all the additives at the tank farm that are different, big deal! No Nox, Octane, Dri Gas, Hi Po, etc, etc, they are all additives! I've never felt or seen any difference between Safeway, Giant, Sam's, Mom & Pop, Dothead Gas before! Whoever is the cheapest, that's where I'm at!