Always strive to learn something useful. --Sophocles

The key is changing your driving habits. When we went to Phoenix for Memorial Day Weekend, we did the Las Cruces -> Phoenix leg at around 65 MPG and got 36-36 MPG over 400 miles and still got there in about 7 hours. I've occasionally coasted down from Cloudcroft to Alamogordo with the car in neutral but the engine still on, but not enough to notice a change in MPG. If I ever get to move back there, it would be an interesting experiment to run over a couple of tanks. It wouldn't work as well going to or from the observatory.

One example in the first article: "Fulton routinely gets 55 mpg from his 1997 Toyota Paseo, a car the EPA rates at 29 mpg."

http://www.wired.com/cars/energy/news/2008/06/hypermilers09

http://howto.wired.com/wiki/Get_More_Than_40_Miles_Per_Gallon_Without_a_Hybrid