Summit Racing oil

Ask Away! with Jeff Smith: Can I Mix Zinc Additive with Off-the-Shelf Motor Oil to Save Money? - OnAllCylinders

Zddp is acidic, detergents are basic. Too much, you ruin metals and can also build too thick of a solid film on metal surfaces that burnishes and can cause a loss of cylinder wall oiling.

Add zddp to off the shelf oil, and the oil life is drastically shortened. Fine for breakin, not much else. I wonder how many cams fail because an engine was prepped and assembled then sat on the stand in a humid environment for several years before actually running?

Blending oil is chemistry. If you're not a chemist, let one do it for you.