There are still a couple of oils that contain the ZDDP additive pack. If it were me I would NOT even consider trying to break in any engine with a flat tappet cam without more protection than JUST the additive's available from some of the cam folks. After all it is called an "Additive" and from speaking to some folks who really know what they are talking about, Pat McCarthy being one of them. I dont belive the additive alone will get the job done.

There is a lot of talk about Rottella still having the ZDDP additive pack like in the past. This is not the case as Rottella has changed the amount of Zinc in that formula and that information came from Shell there self.

Right know the two oils that for sure contain the old and same amount formula are Brad Penn oils and Valvoline Racing Oil. There could be more I guess but I personally don't know of any...

RS