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					Originally Posted by B4C  ^^ "He wouldnt use it if the check didn't clear" | 
	
 Fixed that for ya. lol
I have heard good and bad about it. It does soak into the metal as materials heat cycle just like they say. Saw a few experiments that proved it independently. The question, and basis of a lawsuit actually, is whether this is a good thing when it comes to some of the modern aluminum alloys in use in modern engines. 
I have used it in the past with no ill effects. Zmax and Sea Foam together made Rally Cav run like new again at 200k miles, so I have nothing bad to say about it.