The average government-rated fuel economy of new cars and light trucks sold in the U.S. in August was a record-high 24.9 mpg, according to the University of Michigan Transportation Research Institute.
UMTRI’s monthly calculation has advanced 4.8 mpg since it began in October 2007. On a model year basis, the sales-weighted average has advanced from 25.5 mpg in 2008 to an estimated 29.8 mpg this year.
The institute says average emission levels for new vehicles are dropping too. Its Eco-Driving Index, a measure of greenhouse gases produced per month by new vehicles purchased that month, has improved 19% since 2007.