I want better fuel mileage from my WJ - JeepForum.com
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post #1 of 56 Old 03-19-2010, 08:13 PM Thread Starter
bensonr
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I want better fuel mileage from my WJ

I have a 2003 Grand Cherokee with 83,000 miles on it. It's stock and gets about 16 mpg city and 20 mpg highway. I'm looking for upgrades to increase the mpg's. Maybe a header, exhaust, remove the cat, cold air intake, performance module, chip or whatever. Help please!

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post #2 of 56 Old 03-19-2010, 08:17 PM
Falkon
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Probably the best thing you can do to increase milage is to fill your tires to at least 38 lbs or the max listed on the tire. That and take it easy on thge pedal on the right. You're actually getting pretty good milage.
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post #3 of 56 Old 03-19-2010, 08:22 PM
straty1987
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that mpg is good for a jeep but do you have a V8 or I6?

and all the things you listed is performance so you will get more power and more likely burn more fuel getting you less mpg.

look into doing a full tune up, seafoam the jeep, only driving at 65 MPH max on the highway, don't go past 2K RPM's, and take it easy on the skin petal.


as for the PSI in the tiers keeping them all the same will help something like 33-35 PSI. just make sure all are the same.
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post #4 of 56 Old 03-19-2010, 08:25 PM
QuadraTokn
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If there was just a couple things you could do to increase the mileage, it would have been done so from factory.

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post #5 of 56 Old 03-19-2010, 08:30 PM
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Originally Posted by QuadraTokn View Post
If there was just a couple things you could do to increase the mileage, it would have been done so from factory.
Agreed, I now get 300-450 kms a tank
Its a jeep, drive it and be happy and have fun/ enjoy driving it and filling it up more than other vehicles!

If you want mileage go get a civic or jetta tdi
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post #6 of 56 Old 03-19-2010, 08:36 PM
rustynail
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16 - 20 mpg and you want better mileage. I'm dreaming of the day I get 12. Off road I get about 8.

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post #7 of 56 Old 03-19-2010, 08:38 PM
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You could also try 22" tires, and re-gearing to 2.35

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post #8 of 56 Old 03-19-2010, 08:43 PM Thread Starter
bensonr
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It's an I6. Anyone tried the RS4 Gas Saver chip?
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post #9 of 56 Old 03-19-2010, 08:50 PM
straty1987
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Originally Posted by bensonr View Post
It's an I6. Anyone tried the RS4 Gas Saver chip?
i don't want to break it to you but do you really think you it will do everything it says for $60?


also from the factory max MPG they could get form the I6 is 15/20. so be happy with the MPG which is good form the jeep or get a compact car with a small engine
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post #10 of 56 Old 03-19-2010, 08:54 PM
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Quote:
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It's an I6. Anyone tried the RS4 Gas Saver chip?
Thats a scam dude.

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post #11 of 56 Old 03-19-2010, 09:16 PM
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Thats a scam dude.
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post #12 of 56 Old 03-19-2010, 10:15 PM
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stop driving it. you'll get excellent fuel economy.
but seriously, if you already maintain it properly, id say changing your driving style can really affect your fuel economy. eg. smooth braking and acceleration, coasting before you get on the brake.. stuff like that
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post #13 of 56 Old 03-20-2010, 07:04 AM
metalhead
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The best thing is to coast down hills and try to go easy on the brakes. Try to time it so you can coast to a stop light and lightly use the brakes.Keep the rpm's at 2k. As far as air pressure in the tires, I keep it at 38psi. I go half way between the max pressure on the tire and what the sticker on the door says.
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post #14 of 56 Old 03-20-2010, 08:01 AM
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Plan your driving better so you can coast more. Basically, try to drive like you have no brakes whenever possible (conserve momentum). Who cares if you only do 15 - 20 mph stoplight to stoplight in the city. If you know you're going to have to stop again very soon, picking up more speed than you need to coast to the next stop is just wasteful.
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post #15 of 56 Old 03-20-2010, 08:30 AM
lloyd877
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That is really good compared to my 12 around town and 21 on the highway. it sounds like you already drive pretty light footed I would say maybe clean your throttle body that always ups mine about a mile and the can lasts a while.

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