Had a 2009 RSV and my fuel mileage was always around 35-40 mpg. Most of that two up. Never pulled a trailer so I can't speak of that condition. But I have a 2006 RSTD now and when I rode it to Va. from Pittsburgh, 2 hours on the turnpike, 4 hours of back roads, I averaged 45 mpg all the way down. Since then I've put close to 2000m in the last two months, riding double, on it and I am getting between 38 and 42 mpg. Pretty happy with that, considering most of my riding is back roads and the RPM's you need to run at to keep these V-4's happy. Regardless of the tank mileage, I always stop at around 130 to 150 miles just to take a break and a drink. Very rarely have I ridden a motorcycle to get from point A to point B as fast as possible. I enjoy the ride and my wife enjoys the view, makes for a great day on a bike. I've also found that most of the guys I know compute their fuel mileage, like my dad did, rounding up to the nearest number that was better then mine. I found that, on the occasions when I ride with others, I'd look at how much gas they put in at the stops. Amazing how the MPG would drop when you do that.