Oil zddp ?

I have been running Mystik JT8 diesel super heavy duty engine oil, it has plenty of zinc and phosphorus. Best diesel oil you can buy exceeds API CI4 spec Rotella T only meets CI4 spec.
best part is a 2 gal jug cost $33.00 makes it $4.00 a quart. Can't use it with cats, but who runs them anyway.