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Review title: Good stuff
Product review: This is the additive our local machinist recommends for running in our flat tappet cam engines. Since they removed all the zinc from non racing oils you need an additive. The only thing that worries me is it says not to use on cars with catalytic converters, but everyone I've checked with says that's only because it will cause a slight decrease in the life of the cats. As for the other guy complaining about the bottle leaking I had no problems with the 3 bottles I've purchased from amazon.
