I have Ceratec in my 2001 Forester with 213K, and my 2011 Fusion 2.5 with 90k. Since neither has had a UOA sample done since putting it in, I can't give hard numbers yet. However, some subjective responses:
Forester did not really show any smoothness improvements, but then again, with Rotella T6 or PP 5W-40 and a hot idle, it was nearly impossible to hear/feel it anyways. So unless UOA comes back much better, I'd say it was of no real benefit in this application. Car does consistently turn in 27.5+mpg for a full tank, which is slightly better than most tanks before Ceratec, which were usually between 26.8-27.2mpg.
Fusion has definitely improved feel, idle now does not shake quite as badly, although there still is some vibration. Mileage has improved noticeably on straight highway driving, around 1-1.5mpg for long drives. Mixed driving over a full tank is returning about 0.8-1.0 mpg better than before Ceratec. As far as wear in this case, I knew going in that it would be nearly impossible for Ceratec to improve things, as all wear metals have consistently been low single digits on 11-13k oil changes. To see if the Ceratec really works, I am going for a 17k interval this time, since Blackstone has repeatedly said 13k is definitely doable. TBN has always been at least 2.2@12k, so I feel confident it should show good results. This run with Ceratec was paired with PPHM 5W-20 and the 41516 Napa Platinum filter (oversized).