OVERKILL
$100 Site Donor 2021
Yes, that has higher levels of phosphorous and zinc, as suspected. It has the same boron figure as this report, which means there's no way it dragged the ~150ppm in the M1 FS 0W-40 up to that.Here is a VOA of Penzoil Euro 5W40 that was used before:
https://bobistheoilguy.com/forums/threads/pp-euro-5w40-sn-plus-formulation-voa.322868/
Nothing really makes sense, guess we'll either never know, unless I can get a retest. What also made me wonder was the TBN of 9.4 which sounded really high too.