I just filled my Prius up for the 50th time. I have driven a total of 22,209 miles and used 430.06 Gallons of gas. This is an overall average of 51.64 MPG. In addition, I just recorded my first tank of gas that yielded over 600 miles (602 miles to be exact) with a tank average of 59.7MPG on the MFD. I filled with two bars still showing; I won't push another round trip commute which is about 85 miles. I have had my Prius almost a year now and ccouldn't be more pleased with the ownership experience. My only maintenance expenses have been 4 oil/filter changes, one tire rotation and swapping tires for the winter. Total expenses for these were $180. Pleased with my Prius? You bet.