U.S. Environmental Protection Agency (EPA) standards now require a major reduction in the sulfur content of diesel fuels and emission levels from diesel engines and vehicles. To meet the EPA standards, the petroleum industry is producing Ultra Low Sulfur Diesel (ULSD) fuel, a cleaner-burning diesel fuel containing a maximum of 15 parts-per-million (ppm) sulfur.
At least 80 percent of the highway diesel produced or imported is now ULSD fuel, replacing most Low Sulfur Diesel (LSD) fuel, which contains a maximum of 500 ppm sulfur. Used in combination with cleaner-burning diesel engines and vehicles, ULSD fuel is improving air quality by significantly reducing emissions. By December 1, 2010, all highway diesel fuel offered for sale must be ULSD fuel. Both ULSD fuel and Low Sulfur Diesel fuel will be available through 2010. Some retail outlets will sell ULSD fuel, others Low Sulfur Diesel fuel, and some will sell both.
Find out more by visiting Clean Diesel Fuel Alliance