Just to clarify, do some Puma stations outside of San Juan have pumps with 3 different options (diesel and 2 forms of gas) at each pump, each option with its own nozzle? I wouldn't think U.S. regulations would allow diesel and gas to be distributed out of the same pump, especially if the 3 nozzles are the same size. Of course, I haven't a clue as to what the regulations say though.