My wife and I just got back from a 1000 mile trip to Canada and back. The first fill was 28.5 MPG, the second fill was 29 MPG and the last was 30 MPG. The last was all highway miles with the cruise control on. Most of the way, the wing was down - I was driving slower than 62 MPH. By the way, my 2007 base coupe ran flawlessly!