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thstone · 12-24-2011, 08:10 PM

I'd flush it well and start over with Porsche (or Prestone) but I wouldn't mix them. The last thing you want is to have a coolent incompatibility and overheat the engine. Not saying that is what will happen, but its definitely not worth the risk.

12-24-2011, 08:10 PM	#12
thstone Certified Boxster Addict Join Date: Nov 2010 Location: Los Angeles Posts: 7,669	I'd flush it well and start over with Porsche (or Prestone) but I wouldn't mix them. The last thing you want is to have a coolent incompatibility and overheat the engine. Not saying that is what will happen, but its definitely not worth the risk. __________________ 1999 996 C2 - sold - bought back - sold for more 1997 Spec Boxster BSR #254 1979 911 SC POC Licensed DE/TT Instructor