Ok, cool.. that ZDDP content is the key to making these flat tappets live a long healthy life, aside from proper break in if course. And yes, to your original question, definitely use a "break-in" oil with a new set of lifters. No idling, bring it up to at least 2k and vary the rpm between 2k and 2,500 rpm over a 20 min heat cycle. This method has worked for me several times over the years. Joe Gibbs break in oil is great stuff.