Since I didn't top off the tank which generally allows for an additional 3 gallons after the pump cuts off, my combined MPG from 8/20 and 8/24 fillup is 17.57mpg 

Date: 08/24/07  MPG: 14.08
Gallons: 14.006  (note - did not top off tank at last fillup!)
Miles: 197.3
Price: $2.539
Total: $35.56
Location: California, MD  

Date: 08/20/07  MPG: 20.69 
Gallons: 15.631  (note - did not top off tank!)
Miles: 323.4
Price: $2.559
Total: $40.00
Location: California, MD 

Date: 08/09/07  MPG: 17.39 
Gallons: 18.663
Miles: 324.3
Price: $2.679
Total: $50.00
Location: Lexington Park, MD 

Date: 08/01/07  MPG: 20.36 
Gallons: 13.410
Price: $2.759
Total: $37.00
Location: Lexington Park, MD