I get 15 at best and can not get any better, its all stock 93 just turned over the 100,000 mile mark,I would think if i can run 70 mph at 1950 to 2000 rpms and at 55mph 1400 to 1500 rpm that it would get better,I am an upkeep finatic and run 40lbs air in each tire,no check lt,runs as smooth and...