Engine Makers, Refiners Face Off On Possible EPA Waiver Of Diesel Sulfur Rule

Petrochemical refiners are urging EPA to relax sulfur limits in diesel fuel in response to hydrogen supply disruptions resulting from Hurricane Katrina. But engine manufacturers are opposing the effort, saying it may damage many engines and increase emissions of particulate matter. The National Petrochemical and Refiners Association is talking to EPA about a possible waiver on a nation-wide, year-round limit of 500 parts-per-million (ppm) of sulfur in diesel fuel because of damage to hydrogen supply operations in the Gulf Coast...