According to a monthly report by Michael Sivak and Brandon Schoettle from the University of Michigan, the average fuel economy of newly purchased vehicles during the month of March 2013 has hit yet a new record all time high.

The average fuel-economy (window-sticker) value of new vehicles sold in the U.S. in March was at a record high of 24.6 mpg. This value is 0.2 mpg up from the revised value for February and up 4.5 mpg from the value in October 2007 (the first month of our monitoring). For a description of the calculations and the recent mpg values, click here.

The University of Michigan Eco-Driving Index (EDI)--an index that estimates the average monthly emissions of greenhouse gases generated by an individual U.S. driver--stood at 0.83 in January. This value indicates an improvement of 17% since October 2007. The EDI takes into account both the fuel used per distance driven and the amount of driving (the latter relying on data that are published with a two-month lag). Please click here for a brief description of what the EDI is, how it is calculated, and the current and recent values of the EDI.