In private meetings late last year, U.S. regulators and automakers staked out preliminary — and opposing — positions in a debate about the companies’ ability to boost fuel economy 50 percent to 54.5 miles per gallon by 2025.
In private meetings late last year, U.S. regulators and automakers staked out preliminary — and opposing — positions in a debate about the companies’ ability to boost fuel economy 50 percent to 54.5 miles per gallon by 2025.