I think my testing is pretty valid because my runs are 100% traffic free, and about 80% steady highway at 55 and the rest 45 mph and around 130 miles round trip, for years i was getting 25 mpg no matter what, to the point I could pull up to the pump and look at my miles and predict with in a tenth of a gallon how much it would hold, plus i park in the same little dip in the concrete when i fill, course not as good as the scangauge guys. now thanks to hypermiling and some tricks I learned here running around 27.5 mpg and shooting for 30 next mod partial bed cover, rear half or 2/3
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