If traffic conditions are right and i can keep between 55-60mph on my 33 mile highway run to work, I have seen upwards of 62.5mpg indicated on the cluster I coast hills if possible (basically i drive without ever touching the brakes, even in heavy traffic) and disable cruise on inclines, Tires are also all at 42psi and the oil is changed every 3000 miles lol. I've also removed the snorkel/silencer on the intake which seems to of made a very tiney difference in economy, Even with the cluster probably being off accuracy wise, Calculating for that still nets 53/58mpg