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Old 08-25-2011, 03:48 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, 10:41 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!

97 Sahara, 74 Renegade, 72 CJ5, 55 Willy's (the Beast) Boss 302, 6:34 gearing, Bose 901 speakers.
God I miss that Jeep. Forgot the kinda Jeep, 80 SX4.
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Old 08-26-2011, 02:47 AM   #3
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55 stay alive
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Old 08-26-2011, 05:57 PM   #4
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55 will give you better gas mileage than anything higher.
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Old 08-27-2011, 01:45 PM   #5
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Lower RPMs = less fuel being used.
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gas , mpg

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