Next time you refuel, LOOK at that gas nozzle…Turn it over and look at the nozzle tube near the end…See that little hole?? THAT is what cuts off the fuel flow when gasoline covers that hole…By inverting the nozzle, your are circumventing the nozzles cut-off feature until the tank is overflowing…You are, in effect, force-feeding your fuel tank…
Tester pointed you in the right direction…