Zinc Additive for Flat Tappet break-in?

I have talked to the guy at my local dealer quite a few times and have no worries about it. I don't know of any oil company whether it be Brad Penn, Royal Purple or Joe Gibbs that will tell you whats in their additive packages. Those are what set them apart from each other. The only reason you know whats in the "shelf" oils is because the EPA demands to know and they publish it. No oil that doesn't fall under the EPA requirment umbrella will tell you whats in the package. I know RP doesn't and I'm sure Brad Penn and Joe Gibbs are the same....those are company secrets.