I played around with my car today. Turned the heat on and off, turned the A/C on and off, turned the fans up and down, etc.
The mileage estimate changed on my screen immediately whenever I did any of those things. For example, turned the AC on, miles dropped from 26 to 24 instantly. Turned it off, miles bumped up to 26 instantly.
It seems the system is pretty good at figuring out how much parasitic energy you're using from the car at any given time.
Also, I was careful to drive my car this morning without using the IC engine at all (and left the heater off, fans off, etc), and logged pretty much exactly 26 miles before it ran out of EV juice. That was with a relatively aggressive driving style, mashing the gas pedal from a stop as far as I could without triggering the IC engine (50%-ish? Basically I've found you can keep it from using the IC engine as long as you keep the needle at or below the mark between "normal" and "power". Once it hits the "power" area and/or about 75mph, it usually trigger the IC to turn on). So the estimate, as far as I can tell, seems dead on for me. It would probably be a few miles more if I drove like a grandma.
Last edited by cockedandglocked; 11-08-2018 at 12:11 AM.