The average fuel economy (window-sticker value) of new vehicles sold in the US in September was at 25.3 mpg (9.3 l/100 km), down 0.5 mpg from the value in August, according to the monthly report from University of Michigan Transportation Research Institute (UMTRI) researchers Dr. Michael Sivak and Brandon Schoettle. This large drop likely reflects the increased sales of light trucks and SUVs, they said.
According to Autodata, sales of light trucks and SUVs were up 16.5% in September 2014 year-on-year; total light-duty sales increased 9.4%, and sales of cars increased 2.3% during the month. Light-duty trucks represented 53% of total light vehicle sales in September 2014, compared to 50% in September 2013.
|Average sales-weighted mpg. Click to enlarge.|
Despite this drop, vehicle fuel economy is up 5.2 mpg since October 2007 (the first month of their monitoring).
The University of Michigan Eco-Driving Index (EDI)—an index that estimates the average monthly emissions of greenhouse gases generated by an individual —driver—stood at a record low of 0.77 in July (the lower the value the better). This value indicates that the average new-vehicle driver produced 23% lower emissions in July than in October 2007.
|Eco-Driving Index. Click to enlarge.|
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).