A little over a year ago I bought a new pick-up. It has a readout that tells me - among other things - my average miles per gallon and the total amount of gas I've used. I reset the gauge every time I full up the tank. I've noticed that when I fill up, the amount of gas I'm charged for is greater than the amount of gas the truck gauge says I've used. If it were sometimes more and sometimes less, I wouldn't think that much about it. But it seems that every time I fill up it is more - that is, the pump says I've used more gas than the truck gauge says. Sometimes it is a small amount - say two or three tenths of a gallon out of a 15 gallon fill-up and sometimes it is six or seven tenths. It could be that the truck gauge is wrong, or it could be that I'm paying for more gas than I'm getting. Has anyone else observed anything like this?