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JK Talk General discussion forum regarding thoughts, opinions and rumors about the Jeep JK Wrangler or related subjects that don't quite fit in the Modified, Stock or Electronics forums.

Is it me or could Jeep get away with ...

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Old 05-20-2010, 07:05 AM
  #11  
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Jeep made a mistake with the gearing in the JK. I've done some long trips (750+ miles) in my Jeep and get better mpg running with O/D off every time.

The 3.8 is just too in-efficient lugging along at 1500rpm. Thats just way to far below the powerband.

RPM doesn't kill the mileage like so many people think it does.

Don't fear the gear.
Old 05-20-2010, 07:09 AM
  #12  
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Originally Posted by rock342
Jeep install 3.21/4.10 gears to meet EPA fleet mileage requirements. They'd have to sell *less* Rubicons if they upped the ratio and lowered their hwy MPG rating. Nobody wants that.
Same thing goes for why there is no gas guzzling Hemi option for the Wrangler, or so I'm told by an industry guy I'm aquainted with here in Omaha.
Old 05-20-2010, 09:48 AM
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Originally Posted by NorthRiver

RPM doesn't kill the mileage like so many people think it does.

Don't fear the gear.
Dead on my friend. it is better to run with revs and a light foot then to the floor while lugging along @ lower rpm's. Rmp's do not consume fuel SUPPLY does. Supply = right foot on the loud pedal.



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