I wish this was true. My nav estimate has been consistently 40-60 miles less than what I arrive with on every long trip I have done. It used to adjust up slowly throughout the trip, but yesterday only added a couple of miles to the original miscalculation and stuck there all the way to the end. Almost humorous to see it telling me I would arrive with 35 miles remaining when I was 1 mile away with 68 remaining.
My observations are completely opposite of yours but I'm never exceeding the EPA rating, ever.
If you want even a somewhat accurate estimate you can't look at the miles left on either screen. Know how far you have driven and watch the battery percentage. It's cold here this morning and I just used 10 percent of my battery to go 25 miles. Obviously that means if I half my battery left I can go 125 more miles before I'm dead. That's why initially the driver's screen didn't show miles. It was an update. The vehicle can never know all 500 variables that affect range/efficiency.
That's mathematically correct and pretty similar to what I do. Even though the truck maxes out at 284 miles remaining on the display at 100%, I routinely get ~3mi/% or more in the summer. But just as easy for me to ballpark (driver displayed range minus actual miles remaining) then add or subtract based on conditions. I know every traffic sign lists miles to the town and not battery % to the town, so a bit more intuitive too. And I end up really close every time.
Please don't interpret my comments as defending the nav system. It is terrible. My point is the miles remaining will always be a guess. Just like in an ICE vehicle. The miles remaining in the nav is designed to never get you close to stranded and the GoM will always tell you the same miles left for "X" percentage battery. Or at least mine does. Different number for each mode. I will say the closer to empty the battery is the more accurate it gets.That's mathematically correct and pretty similar to what I do. Even though the truck maxes out at 284 miles remaining on the display at 100%, I routinely get ~3mi/% or more in the summer. But just as easy for me to ballpark (driver displayed range minus actual miles remaining) then add or subtract based on conditions. I know every traffic sign lists miles to the town and not battery % to the town, so a bit more intuitive too. And I end up really close every time.
But I think it's a bit of a free pass from you on just how bad the nav estimate is. Sure it can't adjust for every variable, but the temperature impact alone on battery range is well documented and pretty easy to attempt an adjustment for with even basic math. The nav just doesn't do it at all. At least not in my truck, which makes me wonder if they aren't testing different versions in different vehicles since others have different experiences.
I know I do a roughly 200 mile each way trip to my camp usually twice a month most of the year. I have easily done it 20-30 times in all conditions since I got my truck almost 1.5 years ago. So I have certainly given the nav plenty of opportunities to "learn" something based on the exact same route and my nearly exact same driving patterns every time. It still grossly underestimates my range remaining at the end of that trip every single time.
Despite all the claims of AI solving everything, I still haven't seen a single example of AI figuring out how to autocorrect their/they're/there or your/you're in the ongoing texting induced butchering of the English language. When it does that, I'll believe it's worth the hype.
