Zddp

I will also be using 15W-40 Rotella T when my stroker gets the new cam but it is a roller. Will add some Comp break-in additive for good measure cause the cam bearings, rocker shaft/rocker contact area, and roller ID's will be stressed pretty hard.

BTW, was using Brad Penn oil with the hyd Comp PP 6508 and the nitrided cam came out looking great.