What is the best method, simple method to calculate battery efficiency in terms of mileage? I am watching % use and miles traveled. I am getting betwee. 2.7 miles to 3 miles per drop in 1% of the charge. Is this average? Good? Poor?

That seems right as 100% would be 310 miles or right at 3 miles/%. Or right at 232 watts/mile seems to be the factored range number. Higher than that you will start to fall short below that you can go farther than the 310 miles.

Thanks. This helps. I m new to this forum and I just got my M3 2 weeks ago. I m getting used to it and understand how to make most out of this wonderful driving machine.

353 Wh/Mile 81.1% Efficiency according to teslafi for my recent drives. a little heavy footed for sure

I thought the LR has a 75 kWh pack? If it does, then your math doesn't seem correct. 75000 watt hours / 310 miles = 241.9 Wh/mi Using more than 242 Wh/mi should result in total range on a full battery of less than the advertised "factored" 310 miles (since you're using too much electricity). Using 241 Wh/mi or less should result in total range on a full battery of more than the advertised "factored" 310 miles (since you have extra electricity left over).

I'm going off of TeslaFi, which definitely uses 220 Wh/mi as its 100% rated range number. With that said, I do not disagree with your math. I'm not sure why TeslaFi uses a lower number. Maybe to account for the fact that you can't actually drive the full 310 miles from 100% to 0% in a useful manner, especially given vampire drain. Or maybe they are using the 'real' EPA earned number for the 3 LR, which is 334 miles of range. Assuming 334 and 75 kWh comes to 224 Wh/mi.

I think it was a bunch of launches, air cranked driving. Since then my numbers have leveled out Im now seeing an average of 283Wh/Mile

Like OP, I also like to put the battery so it shows in terms of percentage... it gets roughly 300 mile range, so each percent equals 3 miles. Thinking about the battery in terms of percentage makes sense to me; and if I need to get back to "How many miles do I have left?" you just times the battery percentage by 3 and you have a range number... so if at 20%... you know you have 60 miles left. For my brain, that is a lot easier than seeing 178 miles and having to do a division of 178/310 to figure out the battery percentage.

For the performance+ models, I wonder how big a hit it is to ride with the 20” setup? Or, if dropping to 19” in the future would help a lot? Wish Tesla made 19” Aeros for sure. Saw this (below towards bottom of comment) comment in another thread which is why I’m bringing it up here. Ludicrous Mode for P3D+ only or P3D- inclusive?