Eventually the OP will run our of petrol stations to patronize........or move to Oregon. Here, stations have attendants to fill the tanks, so there's little prepay. Some stations, notably ARCO require you to prepay, but not many.
I managed a Chevron for many years, we had "fast service" in which we would wash windows, and check under the hood, and we had "full service" where we would give customers a quicky vacuum as well as check tires, on top of the fast service perks..........but you paid a hefty sum for that service.
