I bought a cpo p85 6 months back and didnt do much of long drive yet, I have driven nearly 3k miles so far but have started observing that my p85 (2013 model, ~30K miles, P19xxx) gives me around 150miles-180miles on full charge. 180miles if I drive carefully. The last time I charged my car completely and let it drive to 1 mile charge I could see the car give me 55KW(out of 85kw).
I used to charge once a week using SC and top off at home and I observe I lose around 1-2Kw overnight if I leave the car unplugged in overnight. I get around 2.4-2.5miles per KW. Then I started charging at home and L2 charger at office but see no difference.
I used to own a volt before buying p85 and used to get around 3.3-3.5miles per KW with the same kind of driving style (sports mode all the time).
Around two months of acquiring the car, I had to get it serviced for other minor fixes and complained about the range. Since I did not drive much by then it was just an observation and the SC advised me to do a full battery refresh cycle 3 times ie complete charge to nearly empty which I did for more than 3 times. Still no help. :-(. Our first long drive to LA<->Santa Barbara was a bummer as we spent nearly 2.5hrs SCing at two locations for the entire trip. Now my volt lease is up and wife refuses to lease model X and is questioning my model 3 booking :-(. I have called SCenter and got an appmt for Oct 5th. I Hope they resolve the range issue else its bye bye Model X n 3.