I had 99.9 after refueling once. I drove from the gas station home on EV mode only. I guess i could have reset the display to give me this artificial bragging rights, but it is really usless data. Now if you did that on your trip home for longer than say 20 minutes, congratulations. I would rather see the data that gave the 99.9 just like the data that is giving the 27.0 is showing in that picture.

BTW, my best trip was about 20 minutes, and was 48.1 MPG.