EPA Amends Tier 3 Motor Vehicle Emission and Fuel Standards

The Environmental Protection Agency is amending its regulations on Tier 3 motor vehicle emission and fuel standards to correct errors and clarify its regulations, it said (here). EPA’s final rule corrects mistakes in regulations issued in 2014 that reduce emissions from passenger cars, light-duty trucks, medium-duty passenger vehicles, and some heavy-duty vehicles, and mandates a reduction of gasoline sulfur content from the current 30 parts per million (ppm) average down to a 10 ppm average (see 14042515).