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DEXCOOL uses OAT, or organic acid technology to extend the service life of the product. But one of the primary ingredients is known to soften plastics (or polymers.......sound familiar?) if not kept 'in balance'. One of these 'imbalances' is air introduced into the system. This is typically from very small leaks in the cooling system that most car owners wouldn't be aware of. These leaks, or any other failures, cause DEX to turn acidic over time. Properly maintained, in a perfect or near-perfect system, this SHOULD never happen. This is why we see some cases of DEX'ed LIM gaskets achieving longer lifetimes. They lived in a perfect world. Unfortunately, most of our cars aren't nearly as perfect under the hood as most of us would like to believe.
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