Diesel Vehicles
Advanced diesel vehicles using EPA-mandated ultra-low sulfur diesel (ULSD) fuel are among the most fuel-efficient vehicles available today. Collaborative R&D between DOE, industry and the national laboratories has resulted in improved engine efficiency and very low emissions. Collaboration with the U.S. Environmental Protection Agency, industry, and national laboratories under the DOE Diesel Emission Control Sulfur Effects (DECSE) program provided the supporting data needed to mandate 15 ppm sulfur in diesel fuel as the appropriate level to maintain effectiveness of diesel engine emission control technologies. Most diesel vehicles also can run on biodiesel blends without engine modification.
Progress in DOE- and industry-funded diesel engine R&D is highlighted annually in the Advanced Combustion Engines Progress Report and in the DOE Diesel Engine-Efficiency and Emissions Research (DEER) Conference, now in its 14th year.
This page serves as a table of contents for the Diesel Vehicles section. To learn more, choose from the links below.
Diesel Vehicle Classes 
Learn about light-, medium-, and heavy-duty diesel vehicles.
Light-Duty Diesel Vehicle Availability
Find out which light-duty diesel vehicles are available in the United States.
Diesel Emissions
Learn about current and upcoming emissions regulations and the technologies being used to achieve them.
Selective Catalytic Reduction
Learn how diesel vehicles are becoming cleaner using selective catalytic reduction (SCR) and how Diesel Exhaust Fluid is used in SCR systems.
NOx Adsorbers
Learn how NOx adsorbers reduce nitrogen oxides emissions in diesel vehicles.