Don't get your fuel from the same place your car does.
American gas stations now make more money inside selling food (and cigarettes) than they do outside selling gasoline. But consider what kind of food this is: Except perhaps the milk and water, it's all highly processed, imperishable snack foods and extravagantly sweetened soft drinks in hefty twenty-ounce bottles. Gas stations have become "processed corn stations": ethanol outside for your car and high-fructose corn syrup inside for you. Don't eat here.