That's funny. I asked the same question a couple years ago after installing a new tank and sending unit.

Mine also goes to the dot just below "F" when filled up to into the filler neck.

When my gauge first touches "E" I have determined that there is about 4-5 gallons left. I keep track of my fuel economy and mileage so I can estimate how far I can drive on a full tank of 18 gallons.

I always fill up when the needle get below the halfway mark.


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)