Old station usually cramped and filthy,, men's room smells like an outhouse!
Undertrained or not trained at all. Staff cannot help you with a problem.
So what if it's old? They sell gas just like the rest of the stations.
Convenient location.
After buying one tank of fuel here, my car lost 8 miles to the gallon. Next fill up was at another station and normal mileage returned. BAD GAS. Inside of station smelled like an armpit.