[teddyh]

There are, basically, four things which will improve your gas costs, in rough order of decreasing effectiveness:

1. Move closer to where you work: (http://www.mrmoneymustache.com/2011/10/06/the-true-cost-of-c...)

2. Use a bicycle more often, every time it’s possible. (http://www.mrmoneymustache.com/2013/06/13/bicycling-the-safe...)

3. Switch your car to a more sensible car, which also should have better mileage: (http://www.mrmoneymustache.com/2011/05/02/car-strategies-to-...), (http://www.mrmoneymustache.com/2012/09/04/its-never-too-late...)

4. Learn to drive better. (https://en.wikipedia.org/wiki/Energy-efficient_driving)

[larrys]

"move closer to where you work"

My office is about a 3 minute drive from where I live. The biggest improvement isn't the gas cost it's the fact that I pickup an immediate 1.5 to 2 hours a day in time from not having to commute!)