The average fuel economy of new vehicles sold in September fell 0.1 mpg to 25.2 mpg from August, according to the University of Michigan's Transportation Research Institute (UMTRI).
This decline likely reflects an increase in sales of light trucks, according to UMTRI researchers Michael Sivak and Brandon Schoettle. Fuel economy is down 0.6 mpg from the peak reached in August 2014, but still up 5.1 mpg since October 2007 when the institute began monitoring.
The University of Michigan Eco-Driving Index (EDI), which estimates the average monthly emissions of greenhouse gases generated by an individual U.S. driver, reached 0.82 in July 2016, which was down 0.01 from the value for June (the lower the value the better). This value indicates that the average new-vehicle driver produced 18% lower emissions in July than in October 2007, but 4% higher emissions than the record low reached in both August of 2014 and August of 2015.
Originally posted on Automotive Fleet
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