Quote:
	
	
		| 
			
				 
					Originally Posted by JackG
					
				 
				The OBC is giving you its "best guess".  Reset the trip odometer when you fill up, drive most of a tank out, then refill again at the same place and do the math to get your real gas mileage.  Then you'll know if you have a problem or not. 
			
		 | 
	
	
 
Good idea and common sense...(something I miss from time to time)  
 
thanks.