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Message: <blockquote data-quote="Shocker98GT" data-source="post: 354546" data-attributes="member: 9697">Another good thing is Amsoil is one of the few companies that still makes oils (some of their lineup) with high levels of ZDDP in them. Most modern oils have removed some of the phosphorus due to emissions regulations (it's believed phosphorus can promote converter wear). ZDDP is your high pressure, anti-wear additive, and the lack (or at least minimizing) of it has people thinking that's the reason you're seeing more cam and lifter failures nowadays, especially on cars with flat tappet camshafts (older cars).It's the reason comp cams released their new break-in additive no. 159, they actually recommend using it for the life of the car esp. if you're running a flat tappet cam.The filter is equally if not more important. Amsoil makes very good filters, if you don't use theirs (don't have a close dealer or don't like getting online), WIX filters are good as well.</blockquote>