VW TDI PD: UOA PQ-index trend?? Anyone??

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Saw a few TDI UOAs at tdiclub including PQ-index UOA at tdiclub

Isn't that a PD engine?

With M1 TDT, it seems the PQ-index equals the ICP Fe or is slightly higher. Also, I found a UOA from another user, maybe with a different engine model, or even a non PD, I don't know. He got some relatively high ICP Fe, while PQ was 8 in both his samples Low PQ - High Fe

Has anyone been able to establish a PQ trend for the PD engine, ideally including a PQ comparison between VW-spec. and API rated oils?
 
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