Abstract: A fuel tank control for controlling excess fuel in a motor vehicle having at least two fuel tanks. A first fuel tank and a second fuel tank are connected to a motor whereby fuel is supplied to the motor from one fuel tank at a time. A first fuel supply line is connected to an outlet of the first fuel tank and a second fuel supply line connected to an outlet of the second fuel tank to supply fuel to the motor. A switch controls which fuel tank is used. A fuel return line is connected to the motor to receive excess fuel. The fuel return line is connected to a valve having an internal spool to regulate which tank the fuel is to be returned. In operation, when the first fuel pump is operated, the spool is adjusted to return the excess fuel to the first fuel tank via a first outlet line and when the second fuel pump is operated, the spool is adjusted to return the excess fuel to the second fuel tank through a second outlet line. The spool is adjusted by the pressure created by the fuel in the fuel supply line.