Question about 2005 Jeep Wrangler

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Poor gas mileage on my jeep liberty

I have a 2005 jeep liberty and recently noticed i have lost allot of gas mileage. down to 200 miles to the tank. My jeep prior to this averaged 350-400 miles to a tank and has drastically dropped. i am an easy driver and easy on the pedal and last changed my oil, air filter and disconnected my Battery which helped out although it has started to drop back down again. My liberty only has around 65000 miles on it and i keep it in tip top shape. what would be the cause of such poor gas mileage? The gas mileage on my Jeep Rubicon is down from about 14MPG city to 10 MPG. I drive the same way every day. It has happened over the course of the past year. The dealer is telling me its cold weather, but I noticed the decline this summer. No engine lights. Nothing wierd - just the decline in MPG.

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  • Liberty03 Apr 06, 2009

    I am having the same problem with my 03 liberty, 3.7L V6. When I got the truck (used) I was getting about 260 to 280 to the tank. That quickly dropped down to the point where I was only getting 180 to the tank. I took it to the dealer, they replaced that plugs and cleaned the injectors. I got one tank after that for about 270 and went down again. I am around 200 per tank now. They told me that it was from low octaine gas causing it. I started using 93 octaine, and now the new shell gas. Havent seen any improvement. I can't imagine carbon buildup causing this at all. I am thinking either poor air to gas mix or a lousy exhaust system. Any ideas? I do however get better milage when driving on the highway, I can get almost 300 driving between 65 and 80 mph non stop.

  • yadayada
    yadayada May 11, 2010

    I doubt u have a problem or the check engine light would be on, MPG varies with air temp and humility, are your tires inflated to at least 34 PSI, is the engine reaching at least 190 degree's quickly? the list is endless.

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Change your spark plugs if they haven't been changed in awhile. check your tires for the propper psi there should be a sticker on the inside of your drivers door that will tell you recomended air pressures go by this not the recomendations on the tires. also where are you getting you gas does it contain ethanol sometimes this can burn faster.

Posted on Feb 05, 2009

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My Jeep Grand Cherokee 1993 started the same problem
last year with dropping gas mileage.I have seen a lot of posts
with the same problem. Could it be in the gas or the gas companies
themselves messing with the gas so a person has to buy more
because of the newer cars getting 30-40 mpg ? Something to
think about.

Posted on Apr 09, 2013

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