Originally Posted by buickgnx88
Surprised no one mentioned this...get yourself a gas can (any size will do, make sure the size is labeled on it) and fill it up to the fill line. If the pump shows more gallons than the can, then you have a case.
I remember a story about one gas station that was using a setup where they could adjust it from the counter, so if the vehicle looked like they were measuring it they would just let it work normally, if they thought they could get away with it they hit the switch would then cheat people on the gas
so even if you got someone out to measure it if they are using that trick they could get away with it, but if you are sure your jeep can't take that much I would report it to the chain management