I'm now living less than 2 miles from work. The problem is it's in the city limits and I'm still driving to work. My average work commute would be about 26 mpg before, but I was 5 miles each way. Now I'm at about 19 but only 2 miles.
I am considering trying to bicycle to work as it's close enough, but with my city being built on a mountain It's a 350 foot elevation change in less than 1/4 a mile. With a 1/4 mile 200 ft elevation change at the end. That factor probably isn't helping the MPG either.
Even with my average MPG looking terrible, I'm still pretty happy about it honestly. With commute only I'm going to average 1 tank of gas every 2 months. Not bad!