Gas station charging $0.30 above the going rate and their own posted rate for diesel. When I asked about that I was told there were two pumps with two different grades of diesel. ( this was not marked at the pump). There was a small sign posted in the window by the attendant but this was facing away from the diesel pumps and probably 100 feet away gr the pumps. No hope of someone knowing they were being overcharged. Glad my husband caught it before filling up. Nasty.