When PPPP and PUP came out, the NOACK losses given in the SOPUS data sheets for the 5W30 grade were 10% and 11%, respectively...good, but not extraordinary. I think an independent source at the time came back with 9% and 10% for those two.
As mentioned above, it was the old Pennzoil Ultra (no Platinum) that had the killer NOACK loss (at least for 5W30).
PPPP in the dexos1 grades has been reformulated since then for dexos1 Gen 2 and may have a different NOACK loss than before, PUP is not being advertised as Gen 2 compliant but I have no idea if it may have also changed.
As mentioned above, it was the old Pennzoil Ultra (no Platinum) that had the killer NOACK loss (at least for 5W30).
PPPP in the dexos1 grades has been reformulated since then for dexos1 Gen 2 and may have a different NOACK loss than before, PUP is not being advertised as Gen 2 compliant but I have no idea if it may have also changed.