I have a 2016 P90D Model X. I have told tesla about the degradation in range, and they remote check the batt pack and state that everything is normal. But my wife will not allow me to drive from Corvallis to sisters any more. We’ve also charged in Springfield, and it is hit or miss if we make it to sisters from the Mackenzie pass. You guys will see, these batteries degrade, and do not hold a charge especially in the winter. Range anxiety is a real issue, esp in winter. Last winter we supercharged in Springfield, and it said I would have 29% left when we got to sisters. As we progressed up the mountain, it changed to 19% left. Then started going down and down. By the time we were at hoodoo it said we would only have 2% left if we got to sisters. If it wasn’t for regen while going to down the mountain, we would have been stuck in the snow in winter. Even so, we did not make it to Sisters. We made it to black butte destination charger with 2 miles left in the “tank”. Changed for 15 minutes, and then made it to sisters. What the frick? This is why my son and wife will not let me drive to central Oregon any more. It was truly awful.