I've noticed my wife's MX wh/mi is unusually high(20" wheels 90D) 428wh/mi over the last 5k miles. We have 2 kids under 3, so the rear climate is always on. We are in SoCal, and it's summer, so AC is always on. For fun I plugged the car in and put the HVAC to LO, to see how much power it draws from the HPWC and I was blow away to see about 5.5Kw/h! So being that she mostly does short trips and the AC is running on high at most times, her consumption is crazy. On another note, to see if it was her driving style, we did a 150mi round trip where I drove, no more than 5mph over the speed limit, and I achieved 371 wh/mi Point here: MX HVAC is an energy hog!!!