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Re: Cooling System Help....96 Lumina
The Prestone Extended Life coolant is based on the same technology as Dexcool. It is organic acid technology based (OAT) and technically can be mixed with Dexcool. Best thing to do is flush the cooling system of the old Dexcool and start using coolant like the Prestone XL. Prior to flushing run Prestone Super Flush or similar through the system.
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