I've always wondered how accurate are the range estimates. For the most part, in the first 2000 miles, I had only used 1/3 of the tank, mostly from either gunning it or one time, running out of EV range for a few miles, or testing modes at the beginning. EV range has been mostly accurate based on my daily commute, though sometimes a tad on the high side, but no idea on the HV range. Finally today we did a 135 mile trip, mostly highway, and a few stops in the way. On the way over, I used HV mode exclusively, except for maybe 10 miles. The way back, I stopped HV in the last 15 miles. Used ACC set to 69 mph. Started with 53 EV and 275 HV miles - 27 miles used Ended with 26 EV and 139 HV miles - 136 miles used So, now I'm down to about 1/3 of tank and may finally fill it, as I wonder if the car ever had the HV range update done or not. The most important thing to me was my wife's comment 20 miles in: "this drives very comfortable..."