Originally Posted by DGS
do a google search on the 540rat guy before you trust him blindly...

He even admits that his testing does not simulate what's going on in a running engine.

Yep. The dude's a "Mechanical Engineer" (which is evidently a proper noun), not a tribologist. Take what he says with a grain of salt. Regardless of what he says, ZDDP is a good oil additive and oils with high ZDDP-content should be used during engine and cam break-in. Years ago, we ran some tests to see how much ZDDP some commonly-used oils had in them. The results are posted here.

"When I'm in a slump, I comfort myself by saying if I believe in dinosaurs, then somewhere, they must be believing in me. And if they believe in me, then I can believe in me." - Mookie Wilson