I have a 140k mikes on my 05 MCS and the clutch for the most part has seemed to be fine. However I have a rear main leaking so recently I replaced the oil with Molylube 5x40 and added the Molylube oil leak stop and to my amazement it stopped the leak but this is where it gets interesting. Now my clutch has been slipping, chattering and making that squeal sound. Never did this when I had the leak?? I did just order the Valeo clutch kit with a single mass flywheel. I’ve never done one of these cap we’ll see how it goes. Anyway is that coincidence or what?