U.S. Average Fuel Economy Rises to 24.9 MPG in January By Stephen Elmer Feb 11 2014 Share this Article Tweet The average fuel economy of U.S. new cars as of January 2014 was 24.9 mpg, representing a 0.1 gain over the previous month. Continue Reading... Filed under: Featured ArticlesTags: fuel economy, small car fuel economy, US average fuel economy, what is good fuel economy