When I was a kid, a neighbor had a weekend place next to us. He had an Allis Chalmers B, that someone kept stealing gas from. One Sunday evening he filled the tank all the way up with water. When he came back the next weekend, the tank was dry.

A friend of my dad, who ran a truck farm had the same problem, with his overhead bulk tanks. He got tired of it and had the fuel jobber reverse the diesel and gas tanks. A few days later the neighbor kid had big problems getting his car to start. Some sort of fuel problem, it was.