EPA and Department of Energy (DOE) produced the 2012 Fuel Economy Guide to help car buyers decide which fuel-efficient vehicle is best for them and can save money and greenhouse gas emissions. According to DOE, the vehicle listings provide an estimated annual fuel cost, as well as information about the top fuel economy leaders within each car category. The guide is available online or in print. The online version allows users to input their local gasoline prices and driving habits to receive a more accurate, personalized fuel cost estimate.