At around 4500 miles total I have been averaging right around 23 MPG on my ORP, not counting off-roading or pulling a trailer. That is probably about 70 freeway/30 town going about 65 on the fwy. I just did about a 700 mile trip pulling a small (4x8') trailer--empty one way, loaded but not a lot of weight on the way back) and that dropped it to around 18. I don't count off-roading, as that is highly variable, although I think I got around 17-18 last time (much 2WD some 4WD).
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