petro's has always seemed to be lower than flyin j to me. travelcenters of america is one of the highest.
we run on a fuel card system that gives you a discount when you fuel up at certain stops.
TA, PETRO, Wilco-Hess, and alot of mom & pops are on the list.
flyin j is not part of our program since they offer their own fuel card system, but they are a very clean truck stop. and i have bought fuel their before and paid with credit card. sometimes you have to buy at other places, or you will be stuck on the side of the road and out of fuel.
had to take a shower at one in south GA one time, very clean.