Zinc Additive for Flat Tappet break-in?

I have to double check, but I dont believe it's detergent oil. But, niether is Joe Gibbs...lol. And really, these egnines are not getting milage like they used to, and most things (guides, seals, ring and gasket sealing) have all improved, so there is less contamination anyway. 500 miles? Find a new tehc guy...lol.