19.5 coming home 200 miles cc at 75 2/3 of the way and 80 the rest. Put it in economy modeI don't drive this think like I stole it....I don't baby it or try to hyper-milage either. I mainly drive in normal or comfort mode and generally avoid putting my foot into it unless I have to. My bigger tires (35") haven't made much of a difference (penalty). My best mileage has been all highway travel from Phoenix to San Diego & back on my bigger 35" tires. On the way back from San Diego I kept the cruise control below 80 and it shows (15.92 mpg). On the way there I was at 90 for a good bit of the drive (13.97 to 14.10 mpg). I don't know how in the heck some of y'all are seeing 20 mpg.