16 September 2009

Car program pushes higher fuel economy

While the price of gasoline is certainly not going down by a great degree, U.S. car owners should be paying less per year as the Cash for Clunkers program helped hike the average fuel economy in the country.

Because of the federal program, the average fuel economy of all new vehicles purchased in the U.S. in July and August improved 3%, according to a University of Michigan study.

The program improved fuel economy of all purchased vehicles by 0.6 mpg in July, from an expected 21.5 mpg without the program to an actual fuel economy of 22.1 mpg. August was even better, with an increase of 0.7 mpg, from an expected 21.7 mpg with no program to an actual 22.4 mpg under the program, according to Michael Sivak and Brandon Schoettle of the U-M Transportation Research Institute, who conducted the survey.

The expected fuel economy, without the existence of the program, came from a model that predicts fuel economy from the unemployment rate and the price of gasoline based on data from October 2007 through June 2009.

“Both the unemployment rate and the price of gasoline had significant effects on the average fuel economy of purchased vehicles,” said Sivak, research professor and head of UMTRI’s Human Factors Division. “In the months prior to the program, these two variables accounted for 58% of the variance in average fuel economy.”

In comparison to the average fuel economy of 22.4 mpg in August 2009, the lowest value during the period examined was 20.2 mpg in October 2007. On the other hand, the highest fuel economy previously achieved was 21.7 mpg in May 2008, when gas prices hovered around $3.77 per gallon.

For related information, go to www.isa.org/productivity.