New cars’ fuel economy down in June

January 23, 2015 Atlanta: Cars jockey for position while trying to fill up on cheap gas at the Kroger on Moreland Avenue on Friday afternoon January 23, 2015.  BEN GRAY / BGRAY@AJC.COM
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January 23, 2015 Atlanta: Cars jockey for position while trying to fill up on cheap gas at the Kroger on Moreland Avenue on Friday afternoon January 23, 2015. BEN GRAY / BGRAY@AJC.COM
January 23, 2015 Atlanta: Cars jockey for position while trying to fill up on cheap gas at the Kroger on Moreland Avenue on Friday afternoon January 23, 2015.  BEN GRAY / BGRAY@AJC.COM

Cars jockey for position while trying to fill up on cheap gas at the Kroger on Moreland Avenue on Friday afternoon January 23, 2015. BEN GRAY / BGRAY@AJC.COM

Lower gas prices, leading to an increase in the sales of gas-guzzling light trucks and sport utility vehicles, is the likely culprit behind a dip in the average fuel economy of new vehicles sold in the United States last month.

The average fuel economy (window-sticker value) was 25.4 mpg in June, down 0.1 mpg from May. Fuel economy is down 0.4 mpg from the peak reached in August 2014.

However, vehicle fuel economy is up 5.3 mpg since October 2007, the first month that the University of Michigan Transportation Research Institute began tracking it.

The average monthly emissions of greenhouse gases generated by individual drivers also was up slightly in April, 0.85, compared to March (0.82). Emissions are 15 percent lower nowadays than they were eight years ago, but they’ve gone up 9 percent since reaching a record low in August 2014.


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