FuelEconomy.gov is a website maintained by the US Department of Energy and the US Environmental Protection Agency in order to help consumers make informed fuel economy choices when purchasing a vehicle and achieve the best fuel economy possible from cars currently owned.

The website provides EPA fuel economy ratings for passenger cars and trucks (1985-present); best and worst MPG lists; side-by-side comparisons; user-provided, real-world fuel economy estimates; energy impact scores (petroleum consumption); fuel economics; greenhouse gas and air pollution ratings; vehicles that can use alternative fuels); links to fuel prices and crash ratings; tax incentives for hybrids and alternative fuel vehicles; driving & vehicle maintenance tips; and a downloadable Fuel Economy Guide.

In addition, Fueleconomy.gov also has tools to assist consumers with calculating gallons and dollars saved by better fuel economy and tools to help estimate, record, and track on-road fuel economy.