Mine seemed to get noisier after changing the oil and filter !
Before I changed it I just had the brrrrrrr-click over and over again, afterwards there were times when it was constantly rattling and sounded like a 1970's diesel !
Expensive to replace yes but worth doing - I couldnt put up with it like that for long.
Indy I went to recommended 0w30 fully synthetic for future changes - they have an S40 with over 200k on the clock as a courtesy car which is still on its original VVT thanks to regular oil changes with quality oil
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