I was trying to convince my neighbor to buy a Model S. I explained to him that the range for the 85D is around 285 miles per charge. He was impressed. So we went to Tesla's web page to let him look at some of the options. We came across the section that lets you chose your speed, temperature, etc and it tells you how many miles to expect on a charge. The first thing that was odd was that it wouldn't let you chose a speed over 70 mph (some states have speed limits over 70 mph). Let's be realistic here. I don't know about the rest of the country, but up and down the east coast, NOBODY drives less than 70 mph on the Interstate. Most people drive between 72 and 77 mph. Quite a few drive 80 mph. My neighbor told me he normally sets the cruise at 77. Nonetheless, we chose 70 mph. Living in Georgia, we chose 90 degrees with the A/C on. The absolute best range in those conditions was 249 miles in the 85D. But, if you are a normal person and drive 75 mph, it would seem you would only get 228 miles per charge (the drop from 65 to 70 was 21 miles so I used the same. And Tesla recommends that you not charge over 90% right? If so, that puts you at approx 205 miles of range. Of course, you can't drive it til empty so you have to stop with at least 10 miles of range left (or really more since you HAVE to stop where the supercharger is located). So, it would seem, in typical situations, the absolute most number of miles on a charge would be 195 miles, or 2 hours and 36 minutes of Interstate driving (with the a/c on which you WILL have on in Georgia 80% of the time!). That is about the MOST you will be able to drive on a charge since taking it down to 10 miles of range will not be possible very often. But, for argument sake, we'll say 195 miles, 2 hours and 36 minutes of interstate driving. Then, 40 to 80 minutes of charging so you can drive another 2 hours and 36 minutes. Is that realistic? It really seems like people jump through a lot of hoops to drive their Tesla on trips. I couldn't in good faith advise that my neighbor buy one since they drive to South Florida so many times a year. They would spend so much time charging along the way that it was just ridiculous.