I would argue the counterpoint that few people maintain loyalty to a specific gas station. Maybe to a specific brand due to a loyalty card, but even in the 3-station small town I grew up in everyone would hit up whichever station with the lowest price (a penny or two difference, maybe). Given a gas station's proximity to major highways, customer throughput must be a more important metric than repeat customers for a fuel stop.
I too am a big fan of gas station hotdogs, and I must say one station's dog is about as good as another station's dog. Time spent on the warmer is more important than brand of dog at a gas station.