Average Fuel Economy Up 0.3 MPG in January By Stephen Elmer Feb 04 2015 Share this Article Tweet The average fuel economy of all vehicles sold in the U.S. climbed by 0.3 mpg in January over the previous month. Continue Reading... Filed under: Featured Articles Industry NewsTags: Average fuel economy, average mpg, Average New Car MPG, fuel economy, mpg, new car average fuel economy