I have lost 6 miles since I posted that, somewhere around 15.5k miles or so, and around some update or other I got. Mid october it dropped from 279 to 279 in one day, then went back up to 272 where it now sits with 16.4k miles on the odo.
I havent changed anything (90% set and forget, basically). Note, I am not complaining in the slightest, just giving the data point that I "lost" 7 miles. I dont know if I have or not, it doesnt effect my usage of the car in the slightest, and doesnt bother me in the slightest.
You mean you didn't immediately run out and buy a dyno and wind tunnel so we can test in controlled conditions? For shame ..