LoL! But there is more truth in that statement than many realize. Check this out:You don't need fancy equipment. Just do this test a thousand times for robust data. Satisfying your own curiosity is payment enough, let's go!
I have a 30 mile test loop that I run - 15 miles out, 15 miles back, run late at night so no traffic, 70mph with Autopilot, reset the trip meter after stable at speed and crossing a set marker, measure at end at another set marker, only run when the wind is clam, tires always at 50 psi, etc, etc. But there is more variation in the data than one would expect:
Run A: 50F temps, climate was off, 245 wh/mi
Run B: 60F temps and had just finished supercharging, left AC on at 68F by mistake, 232 wh/mi
What factor was most important in the variation? Was it the outside temp? The fact I had just finished charging and the battery was warm? Or was it some other factor I completely overlooked? It will take a while, but slowly, very slowly, I'll get the data and have some answers.....hopefully before the Model 3 reaches EOL and becomes obsolete