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Unread 03-02-2007, 08:05 PM   #1
Driver8x
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Cherokee Sport Gas Mileage

HI,
I was wondering what if anything I can do to get better mileage on my 2000 Cherokee Sport 4WD 4.0L. I get 13.5 to 15.5 mpg depending on season in suburban traffic. I get 23 to 25 mpg higway @ 70 plus mph which is OK. I have a Cold Air Intake installed. That helped the performance but did little to improve mpg. I have 38000 miles in it and it starts & runs great. Any ideas? What kind of mileage are others getting. Thanks.

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Unread 03-02-2007, 08:10 PM   #2
severous01
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you're in the highest percentage as it is.....if you want better put in a SBC with displacement on demand or get a newer obd2 engine and put it in.

another thing would be to stay off the throttle and reduce tire size, lower gearing (numericly) and reprogram ecm for maximum mileage. but then you'd have a bug on steroids with no offroading options.
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Unread 03-02-2007, 08:11 PM   #3
xjrrrdx
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Just search "gas mileage" you will get pages on pages on pages of only XJ tech forum on gas mileage.

I get 20 on the highway with 34s.
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Unread 03-02-2007, 08:13 PM   #4
Grey4.0L
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Thats probably the best milage your gonna get out of it, thats very good compared to many others ive seen. Most people i know with 4L's are only getting 10 to 11 at best.
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Unread 03-02-2007, 08:17 PM   #5
Chris_Walker
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25 mpg highway is about the best you can get out of it due to the drag coeffecient of the body. There's misc things you can do to improve city mpg a little.
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Unread 03-02-2007, 08:51 PM   #6
Rescue XJ
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A cold air intake? you must mean a snorkle.

Your mileage is above average for an XJ, be happy.
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Quote:
Originally Posted by tx50cj3a
Vatozone.
Quote:
Originally Posted by 92 Briarwood
I think "that look" is what they teach the chicks in 6th grade when they show them "that film" behind closed doors.
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Unread 03-02-2007, 09:11 PM   #7
Driver8x
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Thanks

Yeah...cool. I figured maybe that my mileage was normal. It's good to hear it from others and know for sure.THX.
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Unread 03-02-2007, 09:36 PM   #8
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35 psi air in tires

no roof rack

no junk inside

msd coil

regular plugs

new fuel filter

new high-flow cat and new performance muffler

that will = 20mpg city, 20-25 hwy with 5-spd manual
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Unread 03-03-2007, 02:06 AM   #9
XJ95mlake
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My 95 sport gets 10-15 City and 19-24 hwy.

I have a magnaflow hihg flow cat and a magnaflow muffler.

when i installed the exhaust i didn't notice huge difference in mpg, but i did get a lot more pep out the the XJ...
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Unread 03-03-2007, 02:36 AM   #10
Pizza Man!
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I'm getting aroung 10-15 hwy/city, and this is a stocker. I also need an oil change, gearbox service, tune-up, new thermostat (definately sticking open), and exhaust. I just need some warm weather for all the easy cheap stuff and some money for the exhaust. My tires are probably a couple pounds low too, come to think of it.

This could be an interesting thread, or even sub forum though. Making the XJ the ultimate DD/gas saver, but still have space when you need it, and be be surefooted Jeep in the snow/rain/crappy dirtroads (but not really offroad). Lighter (2 door for sure) manual, maybe even a six speed, lowered slightly, slight to extreme areo-dynamic mods, maybe a diesel swap (awsome mileage increase there)...
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Unread 03-03-2007, 03:26 AM   #11
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Quote:
Originally Posted by Pizza Man!
I'm getting aroung 10-15 hwy/city, and this is a stocker. I also need an oil change, gearbox service, tune-up, new thermostat (definately sticking open), and exhaust. I just need some warm weather for all the easy cheap stuff and some money for the exhaust. My tires are probably a couple pounds low too, come to think of it.

This could be an interesting thread, or even sub forum though. Making the XJ the ultimate DD/gas saver, but still have space when you need it, and be be surefooted Jeep in the snow/rain/crappy dirtroads (but not really offroad). Lighter (2 door for sure) manual, maybe even a six speed, lowered slightly, slight to extreme areo-dynamic mods, maybe a diesel swap (awsome mileage increase there)...
If you even think about mentioning lowering a stock height jeep again, Im taking your keys.
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Quote:
Originally Posted by tx50cj3a
Vatozone.
Quote:
Originally Posted by 92 Briarwood
I think "that look" is what they teach the chicks in 6th grade when they show them "that film" behind closed doors.
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Unread 03-03-2007, 03:59 AM   #12
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2nd on taking keys .or make him post on the street xj only. bad boy,....
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Unread 03-03-2007, 05:19 AM   #13
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Remove any thing on the roof (ie rack, tire), fold in the side mirrors, put synthetic gear oil in the differentials, and go easy on the skinny pedal.
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Unread 03-03-2007, 02:14 PM   #14
JLBIII
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I've got a 2000 SE with 138,00 miles on the 4.0. When it was new with the Goodyear tires I averaged over 22mpg on the highway and 16.5 mpg city. After the Goodyear's wore out at 53,000 miles I switched to B.F. Goodrich All Terrain T/A. Mileage dropped to 21 mpg highway and 15mpg city plus increased road noise. I now have a new set of T/A's after putting 83,000 on the first. During a recent 13hr highway trip, I averaged 19.5 MPG with two people and full load of hunting and camping gear.

JB
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Unread 03-03-2007, 03:15 PM   #15
severous01
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Quote:
Originally Posted by xjrrrdx
Just search "gas mileage" you will get pages on pages on pages of only XJ tech forum on gas mileage.

I get 20 on the highway with 34s.

wow dude. i'm rockin like 14 with 31's. i was upwards of 22 before the 31's...i guess i should look into a tune and CAI or filter.
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