Just so we can get some hard evidence on this, I plan on doing a UOA on my 2001 Volvo at the next oil change. I am running LM 10W-40 MOS2 anti-friction formula. So far I have been more than happy with the results; it runs smoother, revs faster, and behaves better than it did with the previous fill of Mobil 1 0W-40. As with anything, YMMV!