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Old 08-25-2011, 02:48 PM   #1
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Jeep Gas Mileage

So I've recently started commuting about 50 miles a day to school in my '05 Wrangler Unlimited and I was wondering if using my overdrive switch was worth it or not as far as gas mileage. The road I commute has speed limits of anywhere from 45 to 55 mph (usually I drive 60 the whole way though) and I wanted to know if I could save gas by using my switch which lowers my torque and raises my rpms and acceleration or just letting standard overdrive take over and lower my rpms and acceleration.

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Old 08-25-2011, 09:41 PM   #2
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You'd be better off staying at the speed limit. The faster you go the more rpms, O/D or not, and more rpms means more fuel used to accomplish this.

Also unless the road is nearly flat O/D will be kicking in and out, when it kicks out, rpms will have to rise to hold the speed. Holding a steady throttle vs constant up/down uses less gas.

Plus staying at the speed limit will tend to keep your wallet from loosing weight when you get pulled over. LOL!

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Old 08-26-2011, 01:47 AM   #3
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55 stay alive
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Old 08-26-2011, 04:57 PM   #4
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55 will give you better gas mileage than anything higher.
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Old 08-27-2011, 12:45 PM   #5
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Lower RPMs = less fuel being used.
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