Not the poster, but in my Model Y the ratio of actual miles driven to miles of range decrease shown on the screen is about 0.8 on long trips. So I typically ass

Not the poster, but in my Model Y the ratio of actual miles driven to miles of range decrease shown on the screen is about 0.8 on long trips. So I typically assume my actual range will be 80% of what the car thinks when I start a trip. This probably has more to do with my driving style and air conditioner use than anything else.