I used to carry a short piece of 2X4 in my 94 VX. When I pulled to the pump I would lean out of the open door and toss it in front of the left rear wheel. This seemed to help a lot with more consistent fills. Wide and long (under the rear seat) gas tanks that have long filler necks that do not go into the top of the tank are susceptible to incomplete fills. I found that the wifes Nissan Rogue would take 2 additional gallons if I was patient and lifted the wheel well nearest the filler neck. She always had problems getting the tank completely full.
More than the tanks capacity in fuel is not uncommon, but if you try to fill beyond the pumps qutomatic cutoff, to the top of the filler neck, you risk trashing the vapor recovery sytem as well as hurting your mileage.
regards
Mech
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