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				Oil analysis at 27K on  MY06 2.7L
			 
			 
			
		
		
		
			I decided to sample my last fill of M1 15W-50 which had 5500 miles on it and 8 track days with my wife and I driving back to back sessions. All interstate driving otherwise. 
 
The results were great save the viscosity being a bit lower than it should have. It would appear that M1 in this weight works for this number of track days, but I don't think I'd go any longer.
		 
		
		
		
		
		
		
			
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				2013 Boxster S 
2006 Boxster--sold 
1999 Boxster--sold
			 
		
		
		
		
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