I noticed this in my 3.6.
When I start it in cold condition, it runs without any noticeable noises. No clacking - everything nice and quiet.
Oil pressure indicator is always directly on stop 5 bar.
==References== It starts to clack for 1-2 minutes, sounds like the hydros.
After another 2 minutes the noise is almost abruptly gone and does not come back, oil pressure is still 5 bar.
After 10-15 min oil pressure drops to approx. Two bar.
I made the oil change last summer and am max. 500 to 1000 km with it.
I don't know if he did this before the change, it was always 10W40 in.
The oil is light running from Liqui Moly 10W40.
The same phenomenon has now been reported to me by a friend of his Audi 80 after an oil change to 10W40.
Has any of you had similar experiences? Maybe use another oil next time?
Best regards
René
