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Old 06-21-2011, 10:20 PM   #11
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About 2200 rpms in od at 60mph. 6.0 gas auto, 4:10 gears 265-16 tires. Usually about 8 mpg towing, 13 empty.

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Old 06-22-2011, 09:47 AM   #12
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Cruise at about 64 mph. !800 rpm in tow/haul. 11.5 mpg all day long.

2011 351RLTS Eagle, Mor/Ryde suspension & pin box
06 F350 Lariat PSD, SRW, LB, CC, EGR delete kit, 16K DrawTite hitch, Timbrens, TST TPMS

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Old 06-22-2011, 12:09 PM   #13
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I've been told that for the best fuel economy and performance, your rpm at highway speed should be at the rpm where your engine has peak torque. Gas and Diesel have different torque curves, with gas being a more sharp peak in the curve, at a little higher rpm. For my gas engine, peak torque is at 2000 rpm. So, with me running about 2200 rpm at 60 mph, I guess that would be about right. I find I get 10.9 mpg -USA Gallon, towing the 5,000 lb 22FB trailer, hand calculated.

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