Before you all say to read other forums, please note that I already have. I have adjusted my driving and according to the MFD, I am doing alright. I understand that there will be a difference between the MFD and hand calculations but when I do them, I get the following: Hand calculation: 33.5 MPG (Calculated over 3800 Miles) Recorded MFD average: 42 MPG. (That is the average. My recorded values range from 39.5 - 44 MPG) Why on earth would there be that much difference? I can understand 1 - 2 MPG variance but not almost 10. Not to mention the fact that others here are getting a consistent 45MPG. I do about 70% highway driving and most trips last over 30 Min. I do use the cruise when on the highway as much as possible (I am a multitasker). Also, I have never put more than 9 gallons of fuel in. (9 gallons was when it was blinking at me). I am not so much concerned about the fuel capacity but the mileage variance is startling. Any insight is appreciated.