So does the quality of Top Tier Gasoline sold in let's say Chevron Station that is located in Mexico compare to that of the Chevron Top Tier gas sold in the United States? I would assume it is but top tier is not all about the additive package (in this case the added Techron). What about the content of sulfur, ethanol, and the olefins, and etc? I am driving in Mexico often and wanted to know more about the specifics of the gas sold there.