Foaming diesel is a puzzle to me. When filling my 2006 f350 it takes forever to get a full tank. If I don't allow the foam to dissolve I miss about 4 to 5 gal from filling my tank. I have pumped thous...
Look up "harpoon mod" on your favorite Ford diesel forum. This is a mod on earlier Fords where you shorten the vent and filler tubes going into the tank and results in faster fill ups. It allows more fuel to enter the tank before the foam backs up into the filler tube and shuts off the pump. Not sure if a similar mod exists on your year of truck but worth looking into.