I am also seeing between 22 and 23 mpg gallon on hwy driving at 70. I have logged as high as 24.7 and as low as 21 but that was driving 80 mpg between Atlanta and Pensacola. I love my 4runner, I came out of a 2wd 2007 GMC Sierra which averaged around 18. By the way my 4runner is a 2wd also.