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			I use Castrol Syntec 10W40 and have absolutely no chatter at cold start up...you need to change to a different brand/weight, instead of looking at snake oil.
		 
		
		
		
		
		
		
			
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				JGM 
2002 Boxster S 
1973 911 Green FrankenMeanie 
PCA DE Instructor circa '95
			 
		
		
		
		
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