I talked to an Amsoil Tech b4 buying the Dominator because of what I've read about it not having rust inhibitor. Many think it does not because of the outboard motor disclaimer on the Amsoil site. It does in fact have a full additive package including rust inhibitor. Maybe not as much as some oils he said, but still a full additive package. The outboard deal has nothing to do with rust. It has to do with running non TCW3 oil in them which can cause buildup from the low temps not burning off the detergents. That's what he told me anyway. Remember, fogging oil was around long b4 full synthetic oil was the norm. Stuff will rust under the wrong circumstances regardless of oil. And, if it matters, Randy, aka Mastermind runs it and Yamalube. Whichever he can find at the time. He recommended them both to me.
