[Geof3]

Not a chance I would put Dex-cool in an engine, flushed or not. As mentioned the Porsche coolant is full strength, so two to one, basically. Not that much more expensive. The bigger discussion is actually getting all of the old coolant out, and then bleeding the system properly. There are numerous nooks and crannies in the coolant system with the rads up front, just something to be aware of and keep in mind. With all the other stuff that can mess with a drivetrain, I prefer to err and the slightly more exspensive side and use the fluids designed for the engine/trans. Yeah, the Porsche stuff is unicorn blood, but it is the right stuff, and that’s never a bad thing. Most likely never replace it again, and if so, maybe once. So value wise, no issue.