WASHINGTON, July 28 (Reuters) - U.S. auto fuel efficiency is expected to rise slightly this year but with vehicles getting heavier and more powerful it still remains far below the best gains of the 1980s, the government said on Thursday.
WASHINGTON, July 28 (Reuters) - U.S. auto fuel efficiency is expected to rise slightly this year but with vehicles getting heavier and more powerful it still remains far below the best gains of the 1980s, the government said on Thursday.