More than 50,000 older diesel powered engines were upgraded or replaced between 2008 to 2010 because of Diesel Emission Reduction Act (DERA) funding which resulted in major clean air benefits and fuel savings, according a new report issued today - the “Second Report to Congress: Highlights of the Diesel Emissions Reduction Program” by the U.S. Environmental Protection Agency. “The results outlined in this report demonstrate that the clean diesel retrofit program (DERA) is one the nation’s rarest and best examples of a program that actually works, delivering big and real benefits in fuel savings and cleaner air to all 50 states, said Allen Schaeffer, the Executive Director of the Diesel Technology Forum.