According to a December 6 press release, the U.S. Environmental Protection Agency (EPA) and the U.S. Department of Energy (DOE) are releasing the 2013 Fuel Economy Guide, giving consumers clear and easy-to-read information to help them choose the most fuel efficient and low greenhouse gas emitting vehicles that meet their needs. The 2013 models include efficient and low-emission vehicles in a variety of classes and sizes, but notable this year is the growing availability of hybrids and the increasing number of electric vehicles. This year, for the first time, EPA and DOE have added a second top ten list of most efficient vehicles -- separating advanced technology vehicles from conventional gasoline and diesel vehicles. Electric and plug-in hybrid electric models are the most fuel-efficient and lowest-emission vehicles available today and are becoming more common. At the same time, consumers may still look up the conventional gasoline and diesel models that offer superiorfuel efficiency. The 2013 guide provides an estimated annual fuel cost for each vehicle. The estimate is calculated based on the vehicle’s miles per gallon (mpg) rating and national estimates for annual mileage and fuel prices. The online version of the guide allows consumers to enter their local gasoline prices and typical driving habits to receive a personalized fuel cost estimate. The 2013 guide also includes a greenhouse gas rating for each model. More information, including a complete version of the guide and details on the fuel economy labels: http://www.fueleconomy.gov/ and at http://fueleconomy.gov/m/ for mobile devices.