Porsche does not make their own coolant, it is contracted out (and then they slap their name on it), just like every part that is used on the car. More than likely is made by prestone or the like. Any safe for aluminum engine coolant other than the orange stuff is fine. I have never seen it, but the the orange and green coolants mixed together are said to gel. Pink or green and you will be ok.
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Karl Wilen
RennsportKC
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