Topolobampo Sinaloa Pemex sends DIESEL across the gulf by barge to Pichilingue. Tank farm to tank farm. From Pichilingue, pipas, Spanish for tankers haul the fuel northward as far as Jesús María, the last real Pemex gasolinera for many hundreds of miles.
Topolobampo fuel except for USA manufactured premium gasoline comes from either the Pemex refinacion in Salamanca, Guanajuato or Salina Cruz, Oaxaca. The Magna and the diesel are manufactured in Mexico. Pemex does not classify this fuel as being UBA or Ultra Low Sulfur Diesel. Pemex assigns a maximum permissible sulfur content of 300 PPM as compared to 15 PPM sulfur for UBA. No UBA diesel is manufactured in Mexico.
With the exception of Villa Jesús Maria, and Bahía Gonzaga, every PEMEX gasolinera in Baja California (this is the north state) has sold ULSD for the last five years. None of the Bala California Sur, gasolineras sell ULSD, UBA diesel.
Hope this helps.
To satisfy my curiosity I would like to learn if soot contamination of the PARTICULATE FILTERS on the newer diesels is aggregate, or if in-between running on conventional ULSD somehow cleans the filter through regeneration. If it is aggregate then perhaps one or two trips would not be enough to cause problems. I wish there was some way to access further info on this. Talking with a diesel emissions control expert on this would certainly help.
