Wow, thanks guys. Some of you all have been thru it. Both my car and truck are kept outside. It's pretty heavily wooded here. With traps I can keep the mice out of the garage, so I was thinking about keeping both vehicles inside now, but that means buying 2 garage door openers. I might try to make a wire basket and fill it with moth balls are attach it near the gas tanks. Maybe check it when I change oil. Need to do something as taking the bed off my truck to access the gas tank is a pain.