Synthetic oils

Quote: I promise you there's millions of flat tappet cams running around the world just fine and dandy without zddp in the oil. I guess somebody should inform them LOL>


You're absolutely right A-Bomb, there are millions of flat tappet cars running around the world. Where you're wrong is that ZDDP has been part of the additive package in engine oils around the world since the 60's but refineries in north america are reducing it supposedly to help catylytic converters last longer.