Fuel economy of new vehicles slipped in December

January 11, 2012 by Bernie DeGroat
Image: University of Michigan

(PhysOrg.com) -- After two months of increases, the average fuel economy of all new vehicles sold in the United States fell by a half mile per gallon last month, say researchers at the University of Michigan Transportation Research Institute.

Average fuel economy of cars, , minivans and SUVs purchased in December 2011 was 22.2 mpg, down from 22.7 mpg in November and 22.6 in October.

According to Michael Sivak, research professor and head of UMTRI's Human Factors Group, average fuel economy of all new vehicles bought last month was down from 22.3 in December 2010, but up slightly from 22.0 in December 2009.

The all-time high of 23 mpg occurred in March 2011. Average fuel economy for new vehicles sold is now up about two from just four years ago.

In addition to average fuel economy, Sivak and UMTRI colleague Brandon Schoettle issued their monthly update of their national Eco-Driving Index, which estimates the average monthly emissions generated by an individual U.S. driver. 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.

During October 2011, the EDI stood at 0.85, down from 0.87 in September and 0.86 in August. The index currently shows that of per driver of newly purchased vehicles are down 15 percent since October 2007.

Explore further: Higher gas prices help reduce emissions

Related Stories

Higher gas prices help reduce emissions

August 3, 2009

(PhysOrg.com) -- Less driving and greater vehicle fuel economy aren't the only byproducts of higher gas prices—lower carbon dioxide emissions is another benefit, say University of Michigan researchers.

Fuel economy of new vehicles continues to rise

December 6, 2011

(PhysOrg.com) -- Average fuel economy of all new vehicles sold in the United States is up for the second straight month, say researchers at the University of Michigan Transportation Research Institute.

Recommended for you

Magnetic fields provide a new way to communicate wirelessly

September 1, 2015

Electrical engineers at the University of California, San Diego demonstrated a new wireless communication technique that works by sending magnetic signals through the human body. The new technology could offer a lower power ...

0 comments

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.