Any of you guys have any experience with a good locking gas cap? My girlfriends g6 got caught in a case of sugar in the gas tank vandalism. We think her car got mistaken for someone else's or some kids were bored. We cant think of anyone that would do this. Couldn't put any gas in the tube is packed with it. So figured I ask u guys if you know of a good locking cap. I know the ones from wallets and such are crap. When I worked at the dealership we would have to get them off from trade ins that people forgot to give the key and it didn't take much to get those off.