Shortcircuit ,
I purchased a 2013 Model S with less than 26K on it and basically the same range your is showing. Since my 20 mile one way commute is in the carpool lane here in San Diego on the I-15 i'm driving 75 mph for about 16 of the 20 mile trip so I average 3.6 on energy economy and the GOM usually gives me a generous 70 when I start a trip in eco mode and the AC on. Once after driving quite some time time at low speeds it gave me 85 miles on a 100% charge and once after coming up from San Diego to North County with the pedal to the metal it penalized me at 50 miles but I got all that back just getting to the freeway the next day. Anyhow my plan is to charge a work for free until my range drops then I'll charge at both home and work so it should be viable for me (and I'm sure whoever wants to purchase your lease either now or when the lease is up) for quite some time, it will just get a little more expensive for me when the range gets below what I need to get back and forth to work. I have applied for the TOU pilot program with SDG&E and I'll be charging my car at level one rates or whatever they come up with for a rate structure here in Southern California. Good luck with your lease and man it seems like you have had a pretty good run of it. Any way to stretch it out by charging at work to help you in the mean time?