"E.P.A. Issues Stiffer Rules on Vehicle Fuel Ratings"

"WASHINGTON — After two years of imposing increasingly stiff penalties on automakers that overstate their fuel economy ratings, federal regulators on Monday said they would tighten guidelines used in determining the mileage advertised to consumers.

Next year, automakers will face stricter rules for conducting a crucial test or face an audit by the Environmental Protection Agency and potential penalties. The rules for the test had not been updated in over 10 years.

'We think this guidance will result in more accurate fuel economy numbers that consumers can trust,' said Byron Bunker, director of compliance for the E.P.A.’s Office of Transportation and Air Quality."

Aaron M. Kessler reports for the New York Times February 23, 2015.