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			 Registered Member 
			
			
		
			
			
			Join Date: Mar 2003 
				Location: NC 
				
				
					Posts: 64
				 
				
				
				
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			 Check for codes.  Some say replace the o2s every 60K or so but I've had 3 5.0s with well over that many miles on their o2s and they get good mileage (could be better w/ new o2s I'm sure).  They do become less sensitive over time. 
		
	
		
		
		
		
		
		
			
		
		
		
		
		
		
	
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