You did well. I can get 53.5 frequently but it is just not fun not to exceed 65mph barrier.My wife and I took a road trip from SoCal to Lake Tahoe which is about 476 miles each way. Going to Tahoe is up hill so I knew my MPG would not be as good as it would on the way back. On the way there, I didn't particularly try to get better mileage and drove about 70 mph (with CC). This and the uphill direction resulted in an average of 42 MPG. On the way home (down hill) I tried to be more mindful of fuel economy and went no more than 65 mph (with CC) and got 53.5 MPG. I was able to go 500 miles before the fuel light came on. It took 9.4 gallons to refuel at 503 miles. I'm impressed.Edit: Interestingly, the computer indicated an average of 51.1 MPG but my manual calculation was 53.5 MPG.