City to food trucks: Achieve at least 5 miles to the gallon by 2015

Under Greenworks Philadelphia, the city's sustainability plan implemented in the spring of 2009,  food trucks have increased fuel efficiency from 0.7 miles per gallon to two miles to the gallon by 2010, and 3.5 by 2011 on average. In 2012, the average fuel efficiency actually dropped to 3.2 miles per gallon.