JB66, why do you keep the tank 1/4 to 1/2 full only?

I was always told to keep gas tanks full in order to minimize the amount of condensation that can form in the empty air space of the tank and thus minimize the amount of water that gets into the fuel.

1950 Chevrolet 3100 (Ol' Roy)

1939 Packard Standard Eight Coupe (The Phantom) | 1956 Cadillac Coupe de Ville (The Bismarck) | 1964 Ford Galaxie 500 coupe |1966 Ford Mustang (Little Red) | 1969 Pontiac GTO (The Dishpit) I 1979 Ford F-100 | 1976 Ford F-150 (Big Red) | 1995 Ford F-150 (Newt)