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			For maximum mileage go all season.  They have a higher wear rating and last longer.  I only get 4-5k on a set of street rears but most of my driving is "spirited" with few hwy miles.
		 
		
		
		
		
		
		
			
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				2009 Cayman 2.9L PDK (with a few tweaks) 
PCA-GPX Chief Driving Instructor-Ret.
			 
		
		
		
		
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