A number of reasons They work and don't trip the nanny mode. I'm averaging 31 MPG. And I'm not easy on the throttle. Plus I plan to do some adventuring touring pulling a tent trailer and every fraction of lower frame clearance I gain is to the positive. Plus every MPG at $ 4.00 per gallon is just that much further I can go. Plus the trailer has storage for 15 gallons of extra fuel. About 21 gallons total with an average of 25 MPG towing the trailer. Or 525 miles per fill up.
Buck1234
Buck1234