My sister borrowed my car today and asked the attendant for diesel but he ended up filling it with gas. She then drove the car with it stalling over and over and then finally pulled into the driveway where it died and won't start anymore. What are the consequences of this? I plan on bringing it to my mechanic Mr. Chill, but I am curious what the problems this will cause and costs. Luckily the gas station has already agreed to cover costs because it was full serve, but they want to do all the repairs them self.