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			Anybody have any experience or thoughts on it?  I am always very warry of any of these additives and their claims, but I must admit when I put duralube in my wife's DeVille, I noticed an incredible increase in the smootness of start up.  From all the informercials I have seen on Speedvision Zmax seems the most credible.  So, my questions are, does it do what it claims, and is it necessary?  I would also be interested in hearing about their tranny fluid additive. ------------------ Jason Priest 1986 420SEL | 
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