No, at least in my naturally aspirated VW VR6. Ran for 10k OCI's twice, no issues, UOA'd once viscosity was in mid 11's at 10k with a remaining TBN of 3.4 IIRC.
I am running the Mobil made OEM VW 504 0w30 now, I think the Castrol might have been a gnat hair quieter but they are really close.