Average Fuel Economy of New Vehicles Reaches New High of 25.4 MPG in March By Jason Siu Apr 04 2014 Share this Article Tweet The average fuel economy of new vehicles sold last month reached an all-time high of 25.4 mpg. Continue Reading... Filed under: Featured ArticlesTags: Average fuel economy, average fuel economy of vehicle sales, fuel economy, march vehicle sales, mpg, New vehicle sales