x22 said: (quoted from post at 10:43:17 06/10/08) If weight was the main factor, the 1993 Lincoln I owned should have gotten worse mileage than my little four cylinder Ranger, but it got a lot better. I think it is horsepower per cu inch, axle
ratio and computer programming.
Mainly being shaped more like a dart as opposed to a brick. As your speed doubles your drag quadrouples.
On top of that Ford trucks are usually geared high, my brothers 4.6 with 3.55 gears was always grabbing for third and maybe second on hills empty. He put true duals on and now it downshifts as often as my 5.4 with 3.31's, which is not all that often and you are all but climbing a mountain to ever hit second.
High gearing is great if you live where it is flat, but in the hills you are always hunting around trying to keep the engine it is power band. Around here 3.73's would be about the best to have in a truck.
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