So I followed the directions given during my service visit. I ran the battery below 10% and began charging at home to 90%. Still charging, about another hour to go. Based on the percentage charge and switching to distance it appears as if the calculation for a full charge on my LR RWD is 285 miles - still far below what EPA states and consistent with the loss of range I originally posted about. Tomorrow I have a trip to take, about 200 miles, and I after I arrive at my destination the SuperCharger is nearly 50 miles further from my destination. That suggests that I'll need at least a 250 mile range to make it to the SuperCharger. With a projected range of 285 miles at full charge, I'm only charging to 90%, about 255 miles of range. That doesn't give me a lot of confidence, especially since were expecting cooler temperatures and rain tomorrow.
And that's why I posted. I want the range I paid for, and I'm apparently very confused about what my true range is and how to maximize it. Despite everyone's posts, I still don't know if I'm being overly concerned and tomorrow's trip will be fine. But I do know that if I leave the house with 255 projected miles of range, and need 200 just to get to my destination, and another 50 to get to the SuperCharger, and the weather is cool, I'm NOT going to enjoy a stress-free, non range-anxiety ride. And that's what's frustrating me. Even with a 100% charge, the estimated range is only 285 miles - nearly 40 lower than the EPA range, and enough to cause range anxiety.
I paid for the longer range (322 miles) and if that is indeed my true range, I'm fine. If not, I STILL don't understand what I'm doing wrong, and why the range estimate is so low. What am I doing wrong, and what can I do to fix it? Do I have 285 miles of range, 322 or something else? That's really all I want to know, and I'm REALLY frustrated that I don't have an answer to such a basic question.