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			Is your oil 3 gallons over full by any chance?  It had to go somewhere, I would take it (maybe even tow it) to be pressure tested and checked for intermix. 
 
I wouldn't write this off as a fluke on account of the previous owner.  I would much more suspect someone passing off a problem car onto an unsuspecting buyer. 
 
Skoot
		 
		
		
		
		
		
		
		
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