High-zinc oil or ZDDP oil additives?

Yep the VR1 has worked great for me going on 30 years.
I don't doubt Torco is good, I use the 85w140 RGO in my 8.75"
But $22 for a quart of oil better have some well proven independent lab testing that is repeatable.

It better have bikini clad hotties to pour it in for me.