Pictured below is a typical day in the life of my boat. This is on the bay, tanks are just about full (I hold 280g). I can tell you that these consumption numbers (from smartcraft) are generous. When I do the old fashioned calculation (top off, run a bunch of hours and miles, top off again and do the math) I am burning MORE than what you see on the display. (so I don't do that math anymore!) But like someone said above, it makes me happy to see numbers like these. I'd say I'm closer to 0.70mpg in reality, and this boat is much lighter than any 400 or 410. My previous boat was a 1989 340DB with Gen IV 7.4s. That boat had floscans and they were DEAD ON BALLS ACCURATE when matched up to the calculations done the old fashioned way BTW, every car I've ever owned with a computer on the dash spit numbers that were better than what the actual math revealed. It's a conspiracy by the engine manufacturers, I say!! ;-) you can click on the image to make it bigger. And no those are not my toes. I'd never wear that color.