http://www.theblaze.com/stories/gm-overestimates-chevy-volt-fuel-efficiency-by-130-mpg/

By Meredith Jessup; The Blaze ~ Nov 27, 2010

In August 2009, General Motors CEO Fritz Henderson announced that the new Chevrolet Volt, GM’s first electric car, would get an estimated 230 miles per gallon. The faltering car company hoped that the exceptionally high government mileage rating could give the Volt a major sales boost. “Having a car that gets triple-digit fuel economy can and will be a game changer for us,” Henderson predicted.