The service manager said he didn't want to take my money. He said the knocks cause wouldn't be that easy to find. Apparently the clearance that causes it isn't all that much? He basically said to use a heavier weight oil and live with it.

The only other problem I have had with my car is the rusting of the back of the rear wheel well, after 6 years or so which I patched up myself with autobody filler. The finishing touches could have been better (along with the matching of the color), but so far the rust isn't coming back. Seems like the inside of the sheet metal wasn't coated properly from the start.

Michael