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<blockquote data-quote="dennishoddy" data-source="post: 3650093" data-attributes="member: 5412">Of course it depends on the terrain and the wind pulling a high profile vehicle. Ours is 13.5&#039; tall and 101&quot; wide, weighing plus or minus 16,000 lbs depending on how heavy we load it.With zero wind coming from OKC to Ponca I got 10.3 mpg through rolling hills. With a light tail wind, 10.9.With a 30 mph headwind it&#039;s down to the high 8 mpg. Unloaded with a little in town driving and a lot of highway, I&#039;m getting an average of 13.3 with 4:30 gears.My cousin bought a 7.3 Gasser with the 3:55 gear ratio thinking he was going to get better gas mileage. Not so. He gets identical to me with the 4:30 gears. How you may ask?Its all in the computer and the 10 speed transmission. Top gears have engine rpm&#039;s running the same no matter what gear ratio is in the truck. The magic of the 4:30 gears is getting your load moving and up to speed in the lower gears faster than one with a higher gear ratio. It&#039;s reflected in the tow rating. &nbsp;3.55,&nbsp; 21,8004.3,&nbsp; 28,000</blockquote>

[QUOTE="dennishoddy, post: 3650093, member: 5412"] Of course it depends on the terrain and the wind pulling a high profile vehicle. Ours is 13.5' tall and 101" wide, weighing plus or minus 16,000 lbs depending on how heavy we load it. With zero wind coming from OKC to Ponca I got 10.3 mpg through rolling hills. With a light tail wind, 10.9. With a 30 mph headwind it's down to the high 8 mpg. Unloaded with a little in town driving and a lot of highway, I'm getting an average of 13.3 with 4:30 gears. My cousin bought a 7.3 Gasser with the 3:55 gear ratio thinking he was going to get better gas mileage. Not so. He gets identical to me with the 4:30 gears. How you may ask? Its all in the computer and the 10 speed transmission. Top gears have engine rpm's running the same no matter what gear ratio is in the truck. The magic of the 4:30 gears is getting your load moving and up to speed in the lower gears faster than one with a higher gear ratio. It's reflected in the tow rating. 3.55, 21,800 4.3, 28,000 [/QUOTE]

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