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UMTRI: average fuel economy of new vehicles sold in December in US down from November

The average fuel economy (window-sticker value) of new vehicles sold in the US in December was 23.9 mpg (9.84 l/100km), according to the latest monthly report from Michael Sivak and Brandon Schoettle at the University of Michigan Transportation Research Institute (UMTRI). This is an increase of 3.8 mpg (or 19%) from the value in October 2007 (the first month of monitoring); however, the fuel economy in December was down 0.2 mpg from November, likely reflecting the recent reduction in the price of gasoline, they suggested.

The average sales-weighted fuel economy is calculated from the monthly sales of individual models of light-duty vehicles (cars, SUVs, vans, and pickup trucks) and the combined city/highway fuel-economy ratings published in the EPA Fuel Economy Guide (i.e., window sticker ratings) for the respective models.

Average sales-weighted fuel economy of purchased new vehicles for October 2007 through December 2012. Source: UMTRI. Click to enlarge.

The University of Michigan Eco-Driving Index (EDI)—an index that estimates the average monthly emissions of greenhouse gases generated by an individual US driver—stood at 0.79 in October. This value indicates a record improvement of 21% since October 2007, and ties the revised value for September.

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).


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