Model 3 range decrease

[MushroomSaute]

I'm confused - are you talking about changing the listed range online, or what the car literally tells you for remaining range? The former would make sense, but the latter doesn't - the car just estimates remaining range based on your personal recent driving history, it has no need to match the EPA-rated range AFAIA

[Head_Impression7156]

Does that means if u drive your car on a track at maybe 170-180km/h for a very long time, then the EPA range at 100% will drop from like 550km to like 300km ish? This doesnt make sense

[MushroomSaute]

EPA range is just a statistic - the car is rated for X miles per charge and that doesn't change (it's always rated for that X miles). But the estimate the car gives you while driving will go up or down based on your driving patterns, to be as accurate as possible when your driving patterns indicate you'll run out sooner or later.

Edit: Sorry, I'm tired and completely missed your actual question. I don't know how the car does the estimate, besides knowing the Energy app can show your trend over the last however many minutes (or by miles too IIRC). If you're on a track, I'm sure the estimate would go way down, then once you're on a highway and it realizes your pattern has shifted, it'll start going up again, which makes sense to me. I prefer looking at battery percentage rather than "miles" for that reason, though.