well...
I have a 99 4x4, the best i have hit is 24-26 on the highway drafting big trucks as much as possible and running 70+ mph. seeing that yours is a 2wd, you might do better, the thing about the 3.0 is that it loves the higher rpm. you might not get anywhere fast from a get go, but it will go at higher speeds long as your not doing anything straining to the truck(example..towing a enclosed trailer). at the higher prms, the engime smooths out a bit and ust hummms right along.