§ 80.520(b)(2) states "Until June 1, 2010, any #1D or #2D distillate fuel that does not show visible evidence of dye solvent red 164 shall be considered to be motor vehicle diesel...except for distillate fuel designated or classified as any of the follow
See More Frequent Questions about Fuels Registration, Reporting, and Compliance Help. The dye provisions in § 80.520(b) do not directly require that dye be added at the refinery gate. The dye provision establishes a presumption that fuel is highway fuel if it is not dyed. As a result, in the…