Zero stations in Baja California sell anything other than UBA diesel imported from either the USA (15 ppm) and Japan (frequently 0 PPM). Zero stations in BCS from the eagle monument south sell UBA ULSD. The average sulfur count in Mexican diesel is 240-270 ppm azufre.
MARINE DIESEL is for ships and it sells for about 3/4 the price as gasolinera diesel and averages 200=600 ppm sulfur. Plain not available.
As of this writing the more southerly gasolinera that has USA refined ULSD is the one at Villa Jesus Maria 32 miles north of Guerrero Negro. A new gasolinera is under construction immediately north of the Eagle monument.
Surprise. not one single drop of gasoline sold in Baja California is of Mexican origin. it's either USA or Japanese refined. In Baja California Sur as in the rest of Mexico Pemex Premium is USA made with a tiny percentage being Japanese.
Hope this helps.