Starting in 2006 the U.S. EPA required that all diesel fuel sold for use in highway vehicles meet ultra low sulfur requirements (sulfur content must be less than 15 ppm). In coming years diesel fuel sold for use in nonroad diesel applications will also have to meet this new requirement. The following information addresses questions and concerns operators of diesel-powered vehicles and equipment may have with this cleaner fuel.

• "The Time is Right for the New ULSD Fuel" (Clean Diesel Fuel Alliance information card) - Infocard (PDF - 675 KB).
• "Answers to Important Questions about the New, Cleaner-Burning Diesel Fuel, Engines and Vehicles" (Clean Diesel Fuel Alliance F.A.Q.) - Brochure (PDF - 1.1 MB).
• "New ULSD Fuel and New Engines and Vehicles with Advanced Emissions Control Systems Offer Significant Air Quality Improvement" (Clean Diesel Fuel Alliance Factsheet) - Factsheet (PDF - 1.9 MB).
• "EPA Letter On Fuel Maintenance" - EPA Letter (PDF - 213 KB).