Ultra-Low Sulfur Diesel
Consumers with 2007 or later model year diesel vehicles should only fuel them with ultra-low sulfur diesel (ULSD). ULSD is a cleaner-burning diesel fuel that contains 97% less sulfur than low-sulfur diesel (LSD). ULSD was developed to allow the use of improved pollution control devices that reduce diesel emissions more effectively but can be damaged by sulfur. It is also safe to use with older diesels.
Check the Label
As of December 1, 2010, all diesel fuel sold in the U.S. must be ULSD, and pumps dispensing ULSD must be labeled as such (except in California). Labels similar to those shown here can be found on the upper two-thirds of the pump.
Ultra-Low Sulfur Highway Diesel Fuel (15 ppm Sulfur Maximum). Required for use in all model year 2007 and later highway diesel vehicles and engines. Recommended for use in all diesel vehicles and engines.
Low Sulfur Highway Diesel Fuel (500 ppm Sulfur Maximum). Warning: Federal law prohibits use in model year 2007 and later highway vehicles and engines. Its use may damage these vehicles and engines.
Non-highway Diesel Fuel (May Exceed 500 ppm Sulfur). Warning: Federal law prohibits use in highway vehicles or engines. Its use may damage these vehicles and engines.