50 miles, 75 miles, even 100 miles on a gallon of gas? You bet!  And you can do it by just changing the way you drive.

Learn the core concepts of hypermiling at http://hypermiling.com/car-mpg.html

Hypermiling is gaining publicity.  See these articles on CNN and MSNBC:

Take it slow and save big on gas

‘Hypermilers’ wring out every last bit of mpg

Also I found this interesting paper discussing the philosophical implications of driving.

TRAFFIC “EXPERIMENTS” AND A CURE FOR WAVES & JAMS

One of the first things you need to do to get better gas mileage is to record it.  Here’s how:

https://www.fueleconomy.gov/mpg/MPG.do?action=calcMPG