WASHINGTON -- General Motors said that Obama-era rules aiming to hike fleetwide fuel efficiency to more than 50 mpg by 2025 are "not technologically feasible or economically practicable" and called for a more modest annual increase in requirements.
The automaker said in comments made public on Monday that it does not endorse a Trump administration proposal to freeze fuel efficiency requirements at 2020 levels, and said it instead favors an increase in standards based on "historic rates."