From the New York Times:
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.
Read the full article here.