Just got back from a trip I took to go visit a college. Went from Long Island, NY to Smithfield, RI to Worcester, MA and back (-25 or so miles that I filled up before I officially got home). Calculated the mileage to be 14.4 mpg with I'd say about 85% highway 55-70 mph, rest of the 15% was some city, some normal. My fastman has been shipped and hopefully I'll be putting that on sometime soon. Good thing I didn't get it before the trip or else I would have put it on and never known what I would have gotten highway since it was my first trip. Maybe in the future I'll be redoing the trip with the fastman tb, 180 t-stat, new plugs, and hypertech, I'd like to see what I'd get then.