Before I added the cam and heads, I was getting about 25mpg highway (better than new!), but pretty terrible city mileage. Now, after the heads and cam, I get only a little over 20mpg highway.
It's my daily driver, but it is a very expensive daily driver.
Depends on the conditions you drive in and how you drive.I have DD with drag radials for over 8 years with no issues.But i dont drive stupid in the rain or dry for that fact.
Hell its more dangerous to drive with the lack of traction on normal tires than with dr's.
Mine is 50% DD the other is my cbr600 f4i(43mpg and a lot funner to drive,but gets parked when the temps get below 35 or it rains).. Average on the highway is 22~24 ,around town is 17~19 .That if i drive it normal aka no lead foot.