zMax vs FTC,
http://www.zmax.com/ftc.html:
ZMax can continue to make the claims it has made in the past regarding it's product, pretty much what Shelby says here. A. J. Foyt is also a spokesperson for the product.
Shelby:
Quote:
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"I've built over 100 different kinds of cars… Shelby Cobra, over 20,000 Shelby Mustang, the Viper…at 77, I wanted to see if I could build another good automobile like the Cobra. I call the car the Series One. We're putting zMAX in each and every one that leave the factory. It penetrates the metal, decreases the friction, cleans the carbon residue out of the engine. Therefore it gives you a more efficient engine and a lot more durability. I've got my reputation to protect and I wouldn't recommend zMAX unless I knew it worked."
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So whats the big deal? Myself, I like STP, others don't, use what you like, or not.