I've been concerned with my P90D's range since getting it in March. Took a road trip today and wanted to see if there's something I should get checked out. P90D, 20" tires (over 4K miles on them), range mode ON, driving from Palo Alto area to Truckee and back. I'll focus on 2 legs with data from TeslaLog #1 - Home To Rocklin Tesla supercharger - Beginning 223 range SOC 89% - Drove 142.8 miles starting at 5:05am - Outside temperature ranged from 61-66, AC set at 72 - Avg 404 Wh/mile - Avg highway speed seemed to be ~78 MPH - entirely highway except for maybe 2 miles - Finished with SOC 14%, range 36 #2 - Rocklin Tesla supercharger to Home - Beginning 222 range SOC 89% - Drove 152.4 miles starting at 2:12pm - had to go a different route due to traffic - Outside temperature ranged from 90-75, AC set at 74 - Avg 384 Wh/mile - Avg highway speed seemed to be ~67 MPH - more time on non highway roads (maybe 10-15%) - Finished with SOC 14%, range 35 miles My average Wh/mile only seems to be below 335 if I drive local roads conservatively. I see others that seem to be getting much better Wh/mile and I'm not sure if there's something wrong with the car or my expectations.