I have this information from a petroleum industry executive. The Pemex diesel is LSD. In January it is supposed to be ULSD. I was also told that Arco now has some stations in Sonora that have ULSD. 2 ...
Just imagine going into a station in Canada or the USA and they advertise that you get a complete litre!!!! Not unusual to have a station NOB with bad pumps but purposely altering the pumps is not normal. There are still a few stations between Nogales and HMO where you never see a semi at the pump! They give new meaning to a short litre.