Betty Ann Observed Performance on Maiden Voyage of Sep thru Oct, 2011. June, 2012 update: With two people on the boat and sitting in the cabin, we are still showing around 5 MPG on the fuel flow meter when seas are relatively flat. However, when we add another couple, and have them sit on chairs in the cockpit, the increased weight creates mire drag in the stern, which results in a dramatic drop-off of economy in the range of 4 to 4.5 MPG. It shows how important it is to keep the weight in the boat balanced. However fuel flow meter is one thing, real world is another. Based upon precise mileage figures and gallons of fuel consumed, we averaged 4.6 miles per gallon in 2012.