looking at reynolds website in tenn. they tested a xb2002 with a 200merc and it tested at 8mpg at 56 mph,best i can remember in a test a on bullet i belive the 20ft with a 225 was in the 6.5mpg,either way it is way better than my ol gas drinking johnson on my 295 pro..maybe 3mpg if i baby it and loas it light.if i had the funds i'd love the 20xrd.