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Reply to "ZMAX"

So to get this stright, you buy a bottle of additive that costs maybe 15 bucks and it coats all the metal parts it comes in contact with and makes them close to wear proof. Why don't engine or car makers do that from the get go? Don't they provide those wonderfull 100k powertrain warrenties? Couldn't they buy tanker trucks of this stuff and apply it at the factory and further reduce their warrenty exposure? just wondering.....
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