The average fuel economy (window-sticker value) of new vehicles sold in the US in April was 23.9 mpg (9.84 L/100 km), according to the latest figures from the University of Michigan Transportation Research Institute (UMTRI). Although this represents an increase of 3.8 mpg (19%) from the value in October 2007, when UMTRI started this monitoring, it is down 0.2 mpg from March.
The drop likely reflects the slight reduction in the price of gasoline towards the end of April, according to Dr. Michael Sivak, Director, Sustainable Worldwide Transportation, UMTRI.
The unadjusted CAFE performance in April was 29.3 mpg (8.03 L100km), an improvement of 4.6 mpg (or 19%) since October 2007. (This index is based on a different set of EPA ratings than the window-sticker values.)
UMTRI’s Eco-Driving Index (EDI)—an index that estimates the average monthly emissions generated by an individual US driver—stood at 0.81 in February 2012 (an improvement of 19% since October 2007). The EDI takes into account both vehicle fuel economy and distance driven (the latter relying on data that are published with a two-month lag).