the opening in the car is supposed to be small, this ensures that the nozzle touches the car in some way to ground-out static, newer low wattage cell phone do not have the problems like old 5 watt phones did in auto igniting fuel, only problem with fueling up is that there are no hot naked chicks for full serve and fuel is aroun 7 odd bucks a gallon premium up here even though it comes from our back yard. also perpetual running of any vehicle with a in tank pump below 1/4 full can decrease pump life as the pump being submersed in fuel keeps it cool, oh yeh, and fuel can contain up to 10% by volume of entrained air(diesel especially). so maybe having the air gap when u fuel up is like an aerator on your sink making hot starts worse(maybe)