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Well, it’s slightly more complicated than one or the other. It really depends on what it has in there now. If you don’t know, it would be best to flush it and start from scratch. The Porsche stuff isn’t all that expensive when you consider a gallon is actually two as it is undiluted and will be a 50/50 mix. Lots of opinions on the overall subject, but as mentioned above, using the Porsche factory stuff, you know exactly what is in there and no guessing.
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