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				coolant identity
			 
 
			Not sure what coolant is in my 04 boxster S since I did not buy it new.  Miles are low, but recently had a leak and lost about 3 quarts and need to top it up.  I understand about not mixing the different kinds, but I can't be certain if what is already in there is oem or not.  It is the green color, but that isn't definitive.  I would like to just top it up and not totally flush and refill.  Any way to tell what is in there?
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