Chicken, that's the point. I wasn't explicit when I wrote real world speed, but by that I meant 75 mph. I regularly drive up and down between NC and NY, and for large bulks of the drive I go 75 mph, which to my eye is right about the average of what the other drivers around me are doing. My memory of that tool on the website (which went away a month or two ago), was that going 65 mph to 70 mph was about a 25 mile range penalty. 70 mph was the top speed, so I did a rough extrapolation that another 5 mph to 75 mph would drop another 25 miles in range (I'm sure there are people here who would know if that's fair, or over or underestimating the range loss at the slightly higher speed).
I've done the mental math many times, that by Tesla's own website, even an 85D with 19" tires at it's highway estimate, 295 miles, would drop about 50 miles for speed, for substantial parts of the year 30-50 miles for climate control, and often another 20-30 miles for winds and elevation (I'm concerned I'm being conservative about this). Taking this down another 20% for keeping SuperCharging to 80% at many stops has had me longing for a 350 mile highway rating Model S, so I'll have the capacity for 210 miles, still a bit shy of 3 hours of drive time, after I SuperCharge patiently to 90% any month of the year. I would genuinely be happy to find out my theoretical estimates are missing some real world realities, and I'll do better when I get a new S or X daily driver in about six months.
I've done the mental math many times, that by Tesla's own website, even an 85D with 19" tires at it's highway estimate, 295 miles, would drop about 50 miles for speed, for substantial parts of the year 30-50 miles for climate control, and often another 20-30 miles for winds and elevation (I'm concerned I'm being conservative about this). Taking this down another 20% for keeping SuperCharging to 80% at many stops has had me longing for a 350 mile highway rating Model S, so I'll have the capacity for 210 miles, still a bit shy of 3 hours of drive time, after I SuperCharge patiently to 90% any month of the year. I would genuinely be happy to find out my theoretical estimates are missing some real world realities, and I'll do better when I get a new S or X daily driver in about six months.