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Old 11-22-2007, 01:22 AM   #1
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Anyone....

What do most of you get per tank on the 4.0? The manual says I have a 19 gal. tank. The light comes on around 195 miles but I normally get 200 - 210 out of a tank of gas. Does that sound right? I tired figuring the MPG out but must have done something wrong cause the number I figured was 10.5 MPG and that just can't be right...

It's an 02 X by the way...

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Old 11-22-2007, 01:56 AM   #2
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Disregard! Found what I was looking for!

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Old 11-22-2007, 01:59 AM   #3
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do tell? you sparked my intrest.
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Old 11-22-2007, 02:00 AM   #4
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do tell, you sparked my intrest.
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Old 11-22-2007, 02:14 AM   #5
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Searched around the board and in a thread I had posted a while back and seems like a lot of people are getting around 200 miles per tank... must be what these boxes get on average...
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Old 11-22-2007, 02:14 AM   #6
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I don't know about anyone else but I often get 225-300 miles per tank... I have done up to 20mpg and I have an 00 Sport. It all depends on average speed and how much is city driving. I even get 12-14mpg while pulling my 18' boat.... Is that in line with everyone else?
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Old 11-22-2007, 02:21 AM   #7
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I don't know about anyone else but I often get 225-300 miles per tank... I have done up to 20mpg and I have an 00 Sport. It all depends on average speed and how much is city driving. I even get 12-14mpg while pulling my 18' boat.... Is that in line with everyone else?
Well dammit... why can't I get that... I do not have a heavy foot by any means... Keep the RPM down... just changed the plugs (thought they might have been the problem) and put a K&N air filter in.... no change though... still 200 miles per tank...
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Old 11-22-2007, 02:32 AM   #8
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I had a really good trip, no lights, no wind, straight highway - 14 mpg, but I really need a tune up. Plugs and wires prolly original...00 sport 90,000 miles.
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Old 11-22-2007, 02:42 AM   #9
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I generally get about 14mpg in my "99. Doesn't seem to matter if I'm driving around town or on long trips.
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Old 11-22-2007, 03:00 AM   #10
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In the summer i get about 250-280 on a full tank (until the light turns on) while in winter i get about 190 about when the light comes on. Reason for that is in summer less dense air = less fuel needed and also no need to warm up 5 minutes every mourning while in winter gotta wait to warm up and also denser air so more fuel needed (especially when the engine is cold in the mourning).
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Old 11-22-2007, 03:28 AM   #11
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I only get 180-200 miles a tank full even stock no matter if I'm in the city or highway it stays the same
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Old 11-22-2007, 05:32 AM   #12
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I got 300 to a tank when crossing western kansas on the interstate running 60mph to 65 mph. I have no idea how that happened except it is flat as heck towards the state line of Colorado. Normally I get about 200 in town and 250-275 on the highway, but I keep it at about 65 at all times. I also fill up before I get to the red line so I could probably go farther and I typically average 18-20mpg with the 4.0L. I have a K&N intake, 1" TBS, and a cat-back system from Magnaflow I think (5:30am at work=tired mind). I have a 2" lift and 30" tires. I also run the Bosch Platinum 2 plugs. I don't know if any of that info will help, but I have been very happy with the set-up so far!
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Old 11-22-2007, 07:11 AM   #13
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I regularly get 300 miles on a tank in my 05 4.0L 6-speed.
That includes a good amount of highway driving, though its "commuter highway" driving meaning it isn't smooth driving with lots of slowing down and speeding up.

I do get less in pure city driving, but never 200 miles on a tank!
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Old 11-22-2007, 07:33 AM   #14
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I've been getting 14-15mpg (all country back road driving) since I did my lift this summer. 33x12.50/4"lift. I have not re-geared yet. 97 4.0 3sp auto 3.07 gears.
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Old 11-22-2007, 07:53 AM   #15
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I just add fuel to the tank when it gets to 1/4 tank..... we all need gas, so I dont worry about it.
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Old 11-22-2007, 08:28 AM   #16
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Hey ejmct what rpm is your engine at when driving 70mph? I am curious as to the difference between the newer 6 speed transmissions and the older 5 speed like what I have in my 2000 TJ Sport. It would be awesome to get 300 per tank every time or at least regularly! I wonder what it would take to do the swap if my current 5 speed ever kicks the bucket.... hmmmm... interesting thoughts!
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Old 11-22-2007, 11:10 AM   #17
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i get a bout 220-250 in my 04 rubicon, and this is in the mountains of north carolina.
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Old 11-22-2007, 11:14 AM   #18
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That is about what we get on our 04 Rubi.
There are so many variables to consider. Gear ratio in axles, size and design of tires, etc., etc. Also driving habits, is a big one.
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Old 11-22-2007, 11:26 AM   #19
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02 Wrangler X 4.0 5spd K&N filter, 31" tires 2 inch lift. 200 - 210? miles per tank (till like comes on)

maybe I should take it to the dealer and have a diagnostics test ran on it...
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Old 11-22-2007, 11:28 AM   #20
coilovers are damn flexy
 
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Auto Zone will do it for free, if you have one around you.
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Old 11-22-2007, 11:36 AM   #21
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I get 240ish per tank with my 33's and 3.73 gears.
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Old 11-22-2007, 01:13 PM   #22
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oh btw.. that 19 gal is top to bottom so the light turns on when there is like 3-4 gallons left (i usually fill up right after my light goes on and i fill up w/ about 15.5 gals.) When calculating the mpg enter the amount you fill up in there, not 19)
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Old 11-22-2007, 02:16 PM   #23
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now i thought that my 04 only has a 16 gallon tank but some of you are saying 19? and does the 98 only have a 10 gallon tank?
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Old 11-22-2007, 03:30 PM   #24
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as far as i know they are all 19...some of them just have a longer (?) fuel filler hose
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Old 11-22-2007, 10:27 PM   #25
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basicly
there is NO ten gallon tank

i get between 11-13 MPG with 3.73's and 35's and its pretty hilly and turny here, i try to keep it right at 2K rpm but cant always, so i get around 180-220 a tank, but i fill up right when the light comes on, (usually)
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Old 11-22-2007, 11:12 PM   #26
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so is there a smaller tank on some older models. i thought i had heard that the early tj (or yj) has a smaller one. also i have never been able to put more than 16 gallons in the tank when i am on empty.
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Old 11-23-2007, 12:39 AM   #27
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they are 19 from top to bottom however the light comes on when you've used up 15-16 gals.
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Old 11-23-2007, 01:17 AM   #28
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i wanna play i get about 13-14 mpg. freeway and city,, i hate my jeep for this.. i run 32''s and k&n filter with new plugs.. its an '05x.. I like my jeep but after 2 motocycles accident and and payments along with gas.. I am hurting.. I spend 8-900 a month just for the jeep.

I would be a happy jeeper if I were to get 300 a gal.
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Old 11-23-2007, 01:31 AM   #29
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bpowa, get that k&n out of there or you will be paying lots more...
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Old 11-23-2007, 11:50 AM   #30
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Quote:
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so is there a smaller tank on some older models. i thought i had heard that the early tj (or yj) has a smaller one. also i have never been able to put more than 16 gallons in the tank when i am on empty.
as i already said, i'm pretty sure that they are all 19. if yours will never fill up more than 16 it could be because of the long fuel filler neck/hose (or you still have gas in the tank when you fill up).

i think the most i've put in is 17. but i probably still had 2 gallons left.

btw, cars.com says 19 gal. for 04 jeep and 00 jeep. (since you were wondering about early years having smaller tanks)

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