How do you measure the fuel that is "lost"?
Do you fill up the tank until it is just about flowing out of the cap or do you stop when the pump FIRST stops automatically. If you overfill your tank, some of the extra fuel will immediately go to the canister that on some vehicles is used to absorb gasoline fumes. The newer fuel systems are sealed so evaporation is not happening but if you overfill your tank in cool weather, you can count on some fuel leaving your tank due to heat expansion when it gets warmer.
Personally I don't know how I could accurately measure such a small loss on my 75 gallon tank.
