Photo courtesy of EveryCarListed via Flickr.

Photo courtesy of EveryCarListed via Flickr.

The average fuel economy of new vehicles sold in April reached 25.3 mpg, which was a 0.1 mpg increase from March, according to the University of Michigan's Transportation Research Institute.

The value is up 5.2 mpg since October of 2007 and down 0.2 mpg from the peak of 25.5 mpg reached in August of 2014, according to Michael Sivak and Brandon Schoettle, who compile the report.

The University of Michigan Eco-Driving Index (EDI) — an index that estimates the average monthly emissions of greenhouse gases generated by an individual U.S. driver — was 0.85 in February, up 0.01 from the value for January 2017 (the lower the value the better).

This value indicates that the average new-vehicle driver produced 15% lower emissions in February than in October of 2007, but 7% higher emissions than the record low reached in November of 2013.