Glad you figured it out. I have the same problem with an Arco gas station near my house. Everywhere else i've been I have been able to fill it up properly. I also wait 30 seconds after it's full to top off again. I can usually get a bit more in the tank while the gasoline settles into the tank.Turns out that was just an issue with that particular fuel pump. I haven't had the problem since going to other stations recently. I get the usual amount back in the tank now, minus the reserve that is always there when the fuel light comes on.