Standard diesel is 300-400 ppm
Diesel marina is 600 -1100 ppm
There are stations in the USA dispensing low sulfur diesel not ULSD. California ULSD is mandated by law to be virtually colorless. Standard diesel us dyed red. A 1 liter glass jar is needed to accurately compare color irclack of.
Ever see Delayed Coker and Sulfur treatment refinery vessels? They are huge. Cannot even be transported by rail. Must be assembled on site. Pemex runs it's mouth at publicity banquets to tone down harsh gobernacion and environmental criticism. Jesus Pemex was due to start producing UBA Premium gasoline at it's refinacion Salina Cruz in 2013, 2014, 2015, 2016. Talk talk talk. Imported fuel and allowance of extraneous retail vendors was done for a reason. Need a computer to guess why?