Well Im also not sold on the whole thing either, I completely under stand the flat tapped deal, but I also think that a good oil thats known to have the correct amount of zink and phosphorous should be fine for the camshaft, Like in my case good ol brad penn. I am not arguing the fact that break inn oils help the cam, but what can it help the bearings and rings, like stated above.

Im building a buddies 4.0 for his jeep, and he bought Joe Gibbs break in oil and holy crap nuts batman, 60 bucks for 6 quarts, REALLY???

seems a touch overkill to me.

But Ill run it and make him happy. I remember Dad building engines back when I was a lil snapper and he never had anything special in the oils, just broke the cams in like normal.

My 440 in the Ramcharger was broke in with just Brad Penn 10w30 with a can of zink additive in it, It went fine so far.

and Thanks for the BD wishes Mr performance, aka Dan the man.