The car has algorithms. It calculates the mileage based on what it last experienced (or is currently experiencing). The extremes that i have gotten between 165 and 220 miles in the charging range. I go skiing 140 miles from my home. On the way to the mountain, I will get about 165 miles in cold weather. So no matter what the mileage says when i leave, i will arrive with about 30 miles left in the range. On the way home, going down the mountain, the true range is approximately 220 miles. Both of these examples are when it is about 30 degrees. Warmer weather will do better. So, when i charge to 100 percent to go down the mountain, it will charge to 165 miles at 100. The car was just charged in my garage to 100% after a trip down the mountain and i just checked the app and it says 227 miles. I know when i go back, it will only let me get 165 miles.
The range is better when i drive in the Efficiency mode. I don't know that there is any downside to leaving it in that setting. Anyone find elsewise? I also find a use the left paddle going down the mountain to slow down which generates more power. Another interesting variable is the heat. Turn off the heater and range goes up. When i have range anxiety, I turn on the seat heater and turn down the heat. While i realize that if the range was 300 plus, i wouldn't have range anxiety, i have been enjoying experimenting to get the better range.