In the owners manual, it states to do a gradual fill up after the gas pump has auto shut off. In my experience, when it auto shut offs, there is at least another gallon that can be put in. I am in NJ, and we have full service, so sometimes they top off, other times not.
Also, when the tank reads 1/4 down, its consistenly been equal to 4 gallons when filled up all the way.
Unfortunately, I think this issue has to do with Ford's capless filling port.
2013 Fusion SE Deep Impact Blue 2.0 Ecoboost Luxury Pkg.