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Is prestone dex cool anti freeze okay - 1999 Oldsmobile Cutlass

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Some people say it causes deterioration of gasket materials, which in turn causes leaks in the cooling system. I, personally, switched to a compatible green antifreeze. Dex cool has been known to cause clogging in the radiator and heater core. The decision to use it or not is up to you. It is the recommended antifreeze for GM cooling systems. There are probably just as many mechanics that say it is ok, as there are that says it is no good.

Posted on Mar 20, 2011


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General motors reccomends DEX-Cool but trust me, you do not want that, if it overheats it turns into like a orange muddy sludge, and causes heating problems, and issues with cooling system plugging up. use prestone full strength, that can be used with any color antifreeze, thats what i use in all of my vehicles, never had a problem with it. it usually takes about one and a half gallons.

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GMhas a differant coolant its called DEX-COOL its orange and is good 5 years or 100'000 miles Although i have seen recently prestone has a new coolant that is soppose to work in all vehicles

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