Fuel Economy Guide
-includes information about alternative fueled vehicles, the range of fuel economy for different classes of vehicles, a list of fuel economy leaders, and tips for improving fuel economy. The guide is published jointly by the Department of Energy and EPA. Additionally, EPA publishes lists of the vehicle models with the highest and lowest fuel economy estimates every year. Below are the lists for the 2012 model year Fuel Economy Guide.
The guide and supporting material is available here:
Individual categories are linked here