my car had 9 miles on it and the MPG on the display was 38 point something. I just kept it and just drove away since I didnt know how to reset the meter. so even so the calculated will be off a little since I stop filling up when it clicks, the display on the car had 51MPG on the first fill up.

Im just glad that I can prove the haters that told me that I'll never get 50 MPG. and i accomplished it on my first half tank with many more to come.