Solid roller and Zinc rich oil?

I know flat tappet cams and oil with zinc pretty much go hand in hand, but what about solid roller cams? I hear that you don't really need it from some and that its good to run by others.

The question is in relation to my 360 with a solid roller. I ran brad penn 15w40 in it for about 2k miles so far, but I found some of the same weight castrol oil and always considered it to be good oil (I hope so anyways lol). The brad penn had alot of zinc I believe, and Im not too sure about the castrol. But being a solid roller is that much to worry about? My cam isnt that crazy, and im running about 200 seat and 500 open with MRL pressure oiled solid rollers.

I changed the oil before I parked the car a month or so ago so there isnt really any run time on the castrol. Think its worth it to go back to oil with more zinc?