is comp cams?
 

break in additive enough zinc for my sm approved oil?

Check out this post.

https://moparforums.com/forums/f62/o...-engines-2333/

thanks for posting that gtx

there break in should be good enough
i run it with an oil that still has zinc in it also
remember to pour some oil in the engine, then pour the break in into the oil bottle with the other oil and shake it up
then pour that in
i know it may seem weird, but i was advised by my machinest to do that

What GTX says ... same thing I do with my new motors

I just usually use Shell Rotella-T in 15-40 weight....