Swapped out the PCV for a more stout Audi part no. tonight and had a peak at the top end...immaculate at 85K and this engine regularly sees hard use....a few weeks ago oil temps at 270 for a few days straight at the track. Primarily Liquimoly products(Molygen 5W40 and Leichtlauf High Tech 5W40)/additives (MoS2/Ceratec)/ and several rounds of their engine flush product but HPL now (including their engine cleaner) and a few runs of M1 and QSUD at one point.