You can actually see it on the EPA website. The first source will take you to the official numbers, then if you click on the link that says, for example, Toyota Tacoma 2WD above the picture of the vehicle, it will take you to a page that shows details and owner reports. For example, the 2010 2WD, 4 cylinder auto transmission is rated 19 city, 25 highway, 21 combined. That particular combo has one user report of 22.7 combined with 40% stop-and-go and 60% highway (show details).
www.fueleconomy.gov