Oil additive
#2
As with most additives - you might as well flush your money down the toilet.
The FTC actually sued over zmax, if that tells you something.
http://www.ftc.gov/search/site/zmax
The FTC actually sued over zmax, if that tells you something.
http://www.ftc.gov/search/site/zmax
#5
#6
IIRC, Carroll Shelby even did endorsements for Zmax.
So far as I'm aware, none of those products have been shown to do anything besides take $40 out of your wallet. And some have even been proven to be harmful to your engine. Just run good oil and filter and change regularly, that's all you need.
So far as I'm aware, none of those products have been shown to do anything besides take $40 out of your wallet. And some have even been proven to be harmful to your engine. Just run good oil and filter and change regularly, that's all you need.
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