Could Hypermiling be a solution?
There isn’t much we can do about the price of fuel but there is something we can do about our consumption. A technique called hypermiling (hyper-miling) optimizes your vehicle and your driving habits to maximize your fuel consumption.
Some people have recorded as much as double the mileage using the technique. Some ways to hypermile include reducing drag, accelerating slowly, over-inflating tires, and following closely behind trucks that pull you along.
Fore more information about hypermiling check out http://hypermiling.com/