On our way south on this trip, I made the mistake of using a credit card at a Pilot/FJ station. When I had the desk clerk pre-run the CC, he asked "how much?" I gave him an approx number of gallons and he mentally calculated out loud "50 gallons at $4.25", and I suggested he pre-approve $300. After fueling, I went inside and picked up the CC receipt from "the stack", and saw that the CC price was $4.48. I challenged it, based on the $4.25 he told me up front, but no go.
We drove a short way down the freeway and saw another well-known truck stop with the same cash price as FJ/P, but a much lower CC price. Their CC differential was only $0.07 instead of FJ/P's $0.23. Given their gouging, methinks we won't fill up at FJ/Pilot again.
When we get home, we have a $0.70/gallon discount waiting for us at our local Safeway.