I have 169K on my 98 OBW clutch and I have this stupid story about my clutch. In Aug 05, I did an oil change and put in Mobile One and that winter, my clutch made all kinds of noise..slipping, chatter, I could hear the throw-out bearing working and everything. I thought it would blow out at any time. I went all winter like that. Next oil change, put the high mileage Castrol back in and have not heard a peep out of my clutch since. I know its not related, but man this is weird......