Got 17.26.17 several weeks ago. I am pretty good about noting my energy usage, and drive alot, about 2k miles per month, with a alot of AP1 usage. In range and regular mode, it appears my efficiency has improved. For example, over 19k miles my avg energy usage as 355 wh/mi and now at 20k miles is 352 wh/mi (which is a huge change since the majority has been averaging to 355). I have noticed regular driving yielding ranges of 300-340 wh/mi once the car has been driven a few miles... Anyone have more rigorous data?