Please post what you are getting on a tank with your 570. I realize there are variables for mileage but let us know the type of riding you are doing, if you have bigger tires or other things that affect mileage (mud, low range, steep hills, weather, etc). When I hit the trails I plan to take a friend that will be riding my 600. Expecting much better mileage from the 570. I was able to pick up a set of Goodyear rawhides on steel wheels from an older Sportsman so both machines will be using the same wheel and tire set up.