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Rule Planned to Ease Ultra-Low Sulfur Diesel Fuel Transition

Release Date: 05/27/2005
Contact Information:

John Millett, 202-564-4355/

(05/27/05) To facilitate the transition to the ultra-low sulfur diesel (ULSD) fuel, EPA today announced plans to issue a rule later this year that will take two actions. The first action will shift the retail compliance date from September 1 to October 15, 2006, to allow more time for terminals and retail outlets to comply with the 15 ppm ULSD standard. During this extended transition period, diesel fuel meeting a 22 ppm level can be marketed as ULSD downstream in order to speed the transition. This action will help ensure nationwide transition to 15 ppm ULSD prior to the introduction of new clean diesel trucks and buses. The second action will establish a test program, in cooperation with the fuel industry, to collect the data necessary to determine if the current 2 ppm testing tolerance is sufficient.

These transitional items will not interfere with the planned introduction of clean diesel vehicles and engines anticipated in the autumn of 2006, nor will they reduce the environmental benefits that will be achieved by this historic Clean Diesel Program. For more information on the Heavy-Duty Highway rule, visit: .