i just got back from a 3800 mile trip and i got about 20mpg averaged over the whole time, w/ dj's street tune. but i have a std cab, 2wd. and i am running the fuel additive from wally mart (can't remember the name, powerservice or something). LOTS of full throttle 60-100mph passing blasts, mixed hwy (70-80 mph) and big mountain driving (30-50 mph).
Last time I checked I got 19 mpg traveling70-80 between here and richmond and back. That is just good cruising and no playing around. It is really hard to keep from playing around though so have many other numbers. I still usually average around 15-17 btw I do have a 6 spd though.
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