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The Jeep only idles at about 650 rpm anyway, and it can only be adjusted via the computer. It doesn't raise the idle at all under load, just throttles up a little to maintain speed. My fuel use at idle is simply the product of having a 5.9 liter V8 under the hood. Not a whole lot I can do for it, except minimize idling. In gear with A/C on, 1.2 gph wouldn't surprise me at all.
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Call me crazy, but I actually try for mpg with this Jeep:
Typical driving: Back in Rochester for school, driving is 60 - 70% city
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