McCarthy notes that, while the 2025 Corporate Average Fuel Economy (CAFE) goals are 54.5 miles per gallon for light-duty vehicles, that translates closer to a "sticker" figure of 36 mpg. That means that automakers would collectively need to boost their fleet wide fuel economy by about 10 mpg over the next eight years.
The decision follows up the EPA's November proposal to keep the 2025 emissions targets, and, with the CAFE standards being set in 2012, is part of what the EPA calls its Midterm Evaluation (MTE) for 2017-25 light-duty emissions standards.
How reachable such standards will be remains to be seen. Despite drivetrain technology that has been boosting fuel economy either through more efficient gas-powered systems or broader use of electrification through either hybrids, plug-in hybrids, or battery-electric vehicles, US fleetwide fuel economy has remained at a three-year plateau of 25.1 mpg, according to the University of Michigan Transportation Research Institute's (UMTRI). That's because, while more people are buying plug-in vehicles, Americans continue to buy lots of pickups and SUVs as well.