I have 21” wheels with a 93 octane LMS tune and get about 23 in town and 29-31 on the interstate. Now, I do not give a lot of throttle in town, too many unmarked police cars, and cruise control on trips. When I am on a known stretch of twisty side roads where there is no places for police to sit and am in sport mode, I get 19 mpg having some fun. That only happens when visiting family in the Midwest.