Putting my CPO 2013 P85 away for the winter today, I drove to a garage about 15 miles away. My delivery consultant said to get to very few miles, plug it into a 110 to full, then back down to daily setting and recharge every week or so. I was at one mile rated range with two miles to go. Decided to go for it and pray, and I got there one mile past zero indicated. I am not advocating going below zero, but it did remind me of a Seinfeld episode with Kramer in a Saab. Apparently there is a slight reserve built in. It worked for me today, but I do not plan on testing the theory ever again. Love, Love, love this car! I own five cars and will NEVER not own a model S. Bravo Elon!