I have an '08 with the 4.8 engine with 138k miles. We've put about 10k miles on it since we bought it. Not sure if it's lucky or not, but no smoking. Hopefully it had been done prior or else it sounds like it is imminent, as most don't make it this long. PO owned it from 100k until we bought it and only did oil changes. I got what records I could from the local BMW dealership, supposedly they could only pull there's, not another dealerships, and there was no record of it being done since about 45k...Plausible it had been taken care of by another dealership, not as likely it was done by an indy because it was under warranty until 100k.

For now it is our main cruiser so does get a good amount of highway miles, but it's my wife's DD, which is all city. I'll keep an eye on this thread, might be something we start doing routinely.