US / Nissan Leaf Nissan's Leaf: 99MPG (!?) Feds: Electric car will average $561 a year in electricity By Polly Davis Doig, Newser Staff Posted Nov 22, 2010 5:08 PM CST Copied The Nissan Leaf 100 percent electric, zero-emission car is seen at the LA Auto Show Wednesday, Nov. 17, 2010. (AP Photo/Reed Saxon) So the Nissan Leaf's efficiency technically isn't measured in gallons, but the feds say it's running at the equivalent of 99 mpg, reports the AP—106 city and 92 highway. The EPA says the Leaf can go about 73 miles on a full charge (that's down from Nissan's estimates of 100 miles) and run an average $561 a year in electricity. (More Nissan Leaf stories.) Report an error