When filling the tank I learned to put the nozzle all the way deep into the tank or it will come running out below. And you can't milk the tank all the way full till all the foam is gone like I used to do with my old Powerstrokes. Filling to the rim was how I was able to do hand calc. for mpg. I don't understand how someone can hand calculate without knowing where the fuel level is in the tank. Foam can take up a lot of the volume. Be careful you can make a mess if your not used to it. The manual probably tells you this but who reads that.