I have a P85 VIN:1586 bought in 11/2012. I have close to 16K miles on the car. I live in the Bay Area where the temp today is approximately 70. Last night I did a range charge for only the 4th time since owning the car and I was shocked to see that the Rated Miles on a full charge are only 246. I never let the battery get down below 100- 140 miles. I only used the Superchargers on the way back from LA last year on I-5 because the ones on 101 were not active at the time. When I Supercharged on that trip, I only charged to 90% or less. My car is usually charged to 170-180 miles for daily use. My 90% Rated charge is down to 212. I have been doing all the right things espoused by Tesla - like leaving the car plugged in most of the time so I am very disappointed to see the loss in range. My life time Wh per mile is 316. I feel this is unacceptable. I have taken care of the car and bought 8 year extended warranty and maintenance plans, had the car serviced on time. I don't hod rod or race the car because I have a bad back and have had neck surgery. I think it is time to get in touch with the higher ups in Tesla and find out what the hell is going on here. This is very upsetting to say the least.