The new diesel fuels can be confusing. LowSulfurDiesel, which Canada and Europe have been using for more than 5 years, can have lubricity issues unless additives, such as biodiesel, veg-oil, etc. are mixed with the diesel fuel. The new UltraLowSulfurDiesel has lubricity additives included in the fuel. It's been in Canada for a few months now. Up here there is a blue-green dye added to the ULSD. Apparently the US only recently got LSD and ULSD will be available in October. Perhaps someone in the US knows better info on the timetable.