After having had my S for 13 months and 28K miles, I've gotten a pretty good feel for what my Wh/mi usage is under specific circumstances, particularly my commute to work which always follows the same route. Once spring came and the average temps were typically ranged from 60-80, my average energy consumption for my commute settled in to the 280ish range for Wh/mi. A week ago I had to get two new tires put on the car as I had a puncture in one rear, so I replaced the pair. I used the exact same model tire (thanks to a sale from Tire Rack who is participating here). I have them inflated to the same pressures. I also had the tires rotated at that time. For some reason my energy usage has jumped up to an average 320-330 for the same commute now. I can't figure out why. Temps have edged up a slight bit, but nothing major, and even through summer last year I was able to maintain a sub-300 average even with air conditioning typically. I did get 5.11 recently, but that was a couple of weeks ago, and I didn't notice any energy jump then. I also just found that my suspension auto-lowering was somehow reset to 100+ MPH (I don't know if this is a 5.11 artifact or something the tire shop did). I've since moved that back to the 50MPH setting I had previously, and that doesn't seem to have done it. Any other thoughts? Have other people experienced any energy usage jump with 5.11 and I just didn't notice it?