by Zlati Meyer
USA TODAY and the Detroit Free Press
July 26, 2012
The average fuel efficiency of new cars hit an all-time in the first half of this year, according to new research released today by a Michigan auto-industry research firm.
The average rate was 23.8 miles per gallon, up 1.1 mpg over the same period in 2011, said Alan Baum, principal of Baum & Associates in West Bloomfield.