Hi All, i'm getting 18-19.5 mpg ave, highway/city combined about 50/50. I towed my 5K lbs toy hauler from atlanta to almost alabama (about 100 miles) and im getting 14.6 mpg (65-70mph speed). Does anyone experience this good fuel economy? after reading posts i'm doubting my result lol. Next time I tow again I will hand-calculate to be sure but I'm a happy camper with my fuel results so far. My truck currently have 350 miles.