If his filler tube is the same angle as my 66 wagon, then you need all the economy that you can get.
It's so shallow, that I have to just engage the gas pump, and even at it's lowest setting, may sometimes back up and trigger the pump nozzle auto shut off... Very frustrating...
So I'm going to shoot for a 20 MPG 360 for my wagon.... So I don't have to fill up as often...