Well I put my second tank in and calculated the MPG by hand. It came out to 36.8mpg.

One thing I found like has been stated before is that the mpg that is calculated by the vehicle is high by as much as 3mpg.

One question I have is how accurate is the estimated distance remaining figure? The car is stating that I am currently at 43mpg but is only stating 480 miles left. I have only driven about 35 miles on this tank so far.