Highway mpg is not so nice any more.. Did a 14hr up and back trip and averaged 19mpg. Basically once I passed 65 mph it went from 20.5-21 to 19, sometimes 18.. That's a pretty big hit considering it was upwards of 24-26mpg . But it still drives great no issue with ride comfort or control. I did notice it nicks the back end of the front wheel wells felt liner. Not a biggy when I go home next time I'll take my new Dremel to it and tiddy it up for proper clearance.