I'm not proud of this, but I just got my all-time worst tank. 27.8 MPG! How I did it: 1. It's been in the teens for most of the month, and got above freezing exactly once. 2. Most of my trips have been a little over a mile, with several stops within that mile (including one that usually lasts about four or five minutes). 3. A couple of times my girlfriend sat in the car with the heat running while I ran into a store for five minutes to get something. I am still consoling myself with the fact that any other car would have gotten even WORSE mileage.