I need some help. We have a 2013 Lexus ES-300h. On the navigation display – under Menu, Information, Fuel Consumption, Energy Monitor, Past Record - there is a “Best MPG” display in the bottom right of the display. Ours is currently blank (like we don’t yet have a “Best MPG”. We have ~ 1,100 miles on the car and have re-fueled about 3 times. Is this normal? Where can we read about this anomaly (Owners Manuel page, etc.). Thank you. Richard