I recently flushed and re-filled my coolant when I changed to the LN low temp thermostat. Purchased two gallons of "official" Porsche coolant from Pelican for $33 a piece; not worth risking anything else for pennies, IMO.
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JGM
2002 Boxster S
1973 911 Green FrankenMeanie
PCA DE Instructor circa '95
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