The only way to resolve this is to draw a bomb (a bomb is a petroleum fuel sample) and have it analyzed. The USA is exporting more and more diesel and gasoline to Mexico and what was low percentage just a few years ago is now high percentage. Have ANY of you drawn ULSD in the USA into a clear vessel, then drawn Mexican refined diesel and compared the color of the two?
WHERE? IS? THE? UBA? in this list from Petroleos MexicanosPemex is lock stock and barrel controlled by gobernacion. And politics enters the picture in wholesale fashion. If THAT isn't bad enough, the privately owned barge transport service towing barges from Topolobampo to Pichilingue started diluting Premium with Magna (again) once the price difference of the two fuels became great enough to turn a profit.