[jacob_coulter]

My problem is finding the Havoline brand of Dex Cool, it doesn't seem as if the stores in my area carry it, but they all carry Prestone's version.

Also, if the Prestone Dex Cool formulation is indeed different, or has the ability to ruin my cooling system, it would probably be a good issue to clarify for other Boxster owners who may be in the same boat I'm in.

If I really wanted to err on the side of being safe, I would just buy the Porsche brand of coolant for $50 a jug (which is absurd). I was hoping someone on the board would have some extensive knowledge about what coolant brands would be compatible.