Gentlemen: What motor oil do you use?

After studying the 38 pages for hours, I am looking at Royal Purple Duralec Ultra 10-30. DURALEC® ULTRA™ | Royal Purple
It is a CI-4/SL 10-30 oil that is good for gas or diesel engines and is zinc fortified. I cannot find out exactly how much Zinc is present but the CI-4 rating usually is nominally about 1350 ppm. This seems to check all the boxes and is readily available and reasonably priced. Thoughts???? BTW, this is for a RB stroker that is only about 500 miles old. @slantsixdan ??