The owner's manual has a very short discussion on this. It will adjust for the current temperature, uses previous history, and adjusts as you drive, plus, if you put in a route, it will also use the elevation data in the nav database to refine the predicted range and prompt you if you can make the trip on the current SOC, and if not, show you charging opportunities along the way. My guess is that it uses a moving average, so eventually, those boy racer spurts you did to show off will no longer be part of the equation. With the pro nav, it shows you your range profile with several concentric circles based on the mode you run. This also takes into account the elevation changes based on what I can see. For example, most things west of me are higher up, and my range going that way is less than going east that gets down to sea level. On a round-trip, it evens out somewhat, but it will do this based on a one-way trip until you enter a route. Many people, myself included, have seen the range display stay constant for 5-10 miles, based on the way you drive (IOW, it doesn't always go down anywhere near linearly depending on how you're driving now and where verses the previous history). Your biggest range hits are high speed and creature comforts (especially if you do not have a heat pump and need heat). Your most reliable predictor is probably the distance/kwhr average readout and the power SOC indication, but that requires doing math in your head. Essentially, the car does this for you based on the range left display, but that can be misleading if you're just getting onto the high-speed roadway, or have to climb a steep grade. Really, it's not much different than the gas gauge on your ICE except there aren't as many fueling stations and your tank isn't as big. After some experience, you'll pretty much know, prior to that, it's a little unnerving if you are going to be pushing the limits.