my 2 cents. if you buy a all terrain vehicle that has the aerodynamic's of a brick and weighs more than the circus lady and expect decent gas mileage. You might think about selling and buy a yugo.
22' 2D 2.7l with sasq. 33k miles mostly highway miles getting 19.7. I'm thinking somethings up with yours unless you let it idle a lot and lots of low speed city driving.