The average fuel economy (window-sticker value) of new vehicles sold in the US in June was 23.6 mpg (9.97 L/100km), according to figures from the University of Michigan Transportation Research Institute (UMTRI). This represents an improvement of 3.5 mpg (17%) from the value in October 2007 (the first month of UMTRI monitoring). However, the fuel economy in June was down 0.1 mpg from May (and down 0.5 mpg from the peak in March), likely reflecting the continuing reduction in the price of gasoline.
The UMTRI Eco-Driving Index (EDI)—an index that estimates the average monthly emissions generated by an individual US driver—stood at 0.81 in April (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)
|Average sales-weighted fuel economy. Source: UMTRI. Click to enlarge.|
The unadjusted CAFE performance in June was 29.0 mpg (8.1 L/100km), an improvement of 4.3 mpg (17%) since October 2007. (This index is based on a different set of EPA ratings than the window-sticker values.)