Quote:
GXPinSeattle : I want to flush the DEX COOL from the Solstice GXP (2007 model) and replace it with Prestone Universal Antifreeze coolant.
I'm presuming this would void my car's warranty even tho DEX COOL has destroyed two of my car's engines in 10 years, wouldn't it? In that case, should I risk doing it knowing that I will more than likely have to take on the financial burden for any engine problems that arise later (if that even happens)?
Seriously.. I just don't want that stuff destroying my head gaskets and fittings..
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To answer your question: No, you should not do this. The risk involved is far greater than the reward. What you should do is to make very sure that only Dex-Cool is used when topping-up the coolant.
For one owner to have two engines damaged within 10 years seems to be way beyond the range of normal probability. There are many thousands of vehicles operating successfully with Dex-Cool.
I would also look for a common thread between the failures. Perhaps whoever mainains your vehicles is doing it incorrectly, or is using the wrong materials.