I currently drive about 8 miles each way to/from work. Plus a few other relatively short trips.
I gas up every week, usually Saturday morning or evening. It's usually between $25-$35. Jeeps don't have great gas mileage, I get 14-15 MPG.
Now I'm changing to a "normal" schedule of M-F instead of T-S, and in a couple months I switch to a different location in the county (same company) and only have one gas station between home & work.
The bright side is it'll only be about 4 miles from home to work, but I'll have to figure out where to gas up. I'm not sure about that one place, I'll have to find out where they get their gas from.