Greater Fuel Efficiency:  According to research conducted by Martec Research, new technology diesel engines also contribute to greater fuel efficiency. The owner of a new technology diesel Class 8 heavy duty truck will save $3,500 in fuel costs each year while conserving 21 barrels of crude oil, 875 gallons of fuel and eliminating 8.9 tons of CO2.

All Class 4-8 trucks on the road today deployed with new clean diesel engines save 13.3 million barrels of crude oil, 560 million gallons of fuel and eliminate 5.7 million tons of CO2.

Off-Road Diesel Advancing: Off-road equipment including construction, road building, locomotive, marine, agricultural and emergency back-up generators are also deployed with modern emission control technologies that significantly reduce criteria pollutants. The first phase began in January 2011 to drastically reduce particulate matter emissions. The final phase, beginning in 2014 will similarly bring NOx emissions to near zero levels for the largest machines and equipment.

In each case, EPA has provided for the standards to be phased in over time based on engine size.  Most pieces of construction equipment including bulldozers, backhoes and motor graders, are compliant with Tier 4 standards.  Final Tier 4 rules will apply to larger off-road diesel applications including marine and locomotives beginning in just six months -- January 2014.

 American-Made and a Key Export: The new diesel emission reduction accomplishments and new engine and hybrid technologies are a showcase of U.S. engineering and manufacturing expertise.  Over 90 percent of the heavy duty truck fleet is manufactured in the U.S.

One in every four engines manufactured in the U.S. is destined for overseas markets.  Over $46 billion of diesel technology (engines, vehicles, equipment, parts and fuel) was exported representing 4.4 percent of total U.S. exports. The manufacturing of diesel technology helped sustain 1.25 million jobs and generated $186 billion in national income in 2009, the last year for which statistics are available.