I have a 2015 St Limited with about 13,000 miles on it. This summer I've done a great deal of Interstate driving and I am amazed that this 100 horsepower v twin cannot get any better than 28 to 30 miles per gallon. What went wrong in the design of this vehicle? My 247 horsepower Kia Optima gets better gas mileage then my spyder. That's just wrong.