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					Originally Posted by brjak  if 0 flows well at cold temperature, wouldn't it also flow well at hot temperature? meaning good for summer and winter? Or, is it just to thin for the really hot days? |  
Check out the links in post #12 above., It will give you some insight into multi-viscosity oil
 
0/40 is fine for hot and cold climates 
but I ain't no oil expert
		 
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