My PO 2009 E92 has the OEM PS1's. With 24K on the odo, the tires are at 2.8mm rear and 5.0 mm front.
I have a pair of PSS on order from Tirerack to replace the rears.
“Character is doing the right thing when nobody’s looking. There are too many people who think that the only thing that’s right is to get by,and the only thing that’s wrong is to get caught.”
- J.C. Watts Jr.