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Old 09-15-2008, 06:51 PM   #1
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new to the tj

hey i just bought a 2000 tj already lifted w/ 35s and all the goodies i really like the truck alot except i can just about squeeze 200 miles out of a tank of gas does that sound about right im not sure how big the tank is im comming from the cherokee world but i have noticed there are alot of similarities and alot of differences like um... a frame

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Old 09-15-2008, 06:56 PM   #2
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bigger tires, more gas

i get about the same with a stocker on 31's lol

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Old 09-15-2008, 06:58 PM   #3
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wow really well then i guess it isnt that bad haha
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Old 09-15-2008, 07:41 PM   #4
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Its in the range, I was pulling 12-14mpg highway with my 35's and 4.56s
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Old 09-15-2008, 07:54 PM   #5
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its quite possible that your speedometer/odometer is still off if the PO didnt fix it
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Old 09-15-2008, 09:11 PM   #6
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yeah i think it is, i think i go about 5-10 mph faster than what the speedo is telling me more noticeable at higher speeds than the lower so if i fix that think it should be more accurate the guy said he didnt mess w/ the gears but surprisingly it gets out of its own way pretty good better than my cherokee w/ 32s and 3.55s so idk what gears are in it
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Old 09-15-2008, 09:31 PM   #7
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check the metal tag on the rear diff. im guessing 3.73
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Old 09-15-2008, 09:38 PM   #8
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I does not matter how big the tank is to figure mileage. Fill it up...drive it and track miles since fill up...fill it up the same as last time...divide miles driven by gallons put in and that will tell you mileage per gallon. I normally get to 210-220 before gas light comes on and can go another 50 with light on. Tank should be 19 gallons. I get about 15 miles per gallon mostly in town miles.
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Old 09-15-2008, 10:43 PM   #9
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yeah i'll try that out see what i get i seem to get right around what you are getting 220 before the gas light
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Old 09-15-2008, 11:52 PM   #10
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i only wish i could get over 15 i think thats pretty much a dream if you own a jeep but there is not much out there as fun to drive and get muddy i had a 1980 cj-5 with a 401 it got 11mpg and would out run most anything up to 90 now i have a 05 underpowered 4.0 that only gets 13 but does not matter we still ride in the jeep wife hates it kids loves it
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Old 09-16-2008, 01:15 AM   #11
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Today I did my control test fo gas mileage I ran it till it was dry. Bone dry. 166.78 miles to the tank! I grabbed a buddies old metal can so I didn't look like such a moron but I drove it till well it stopped and there was not enough pressure to turn the truck over!
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Old 09-16-2008, 09:59 AM   #12
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Quote:
Originally Posted by juspimpin View Post
I does not matter how big the tank is to figure mileage. Fill it up...drive it and track miles since fill up...fill it up the same as last time...divide miles driven by gallons put in and that will tell you mileage per gallon. I normally get to 210-220 before gas light comes on and can go another 50 with light on. Tank should be 19 gallons. I get about 15 miles per gallon mostly in town miles.

However, if the speedo is not calibrated to the tires/gears, then this will not give an accurate fuel consumption rate.
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Old 09-16-2008, 12:41 PM   #13
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Dude I have the same jeep as you with 35's as well and I get 140 (if Im lucky) for a full tank of gas...So pray that it last for you lol
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Old 09-16-2008, 01:17 PM   #14
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One thing to keep in mind is the gas gauge is notoriously inaccurate. Mine says it's empty when it still has 5 gallons in the tank which is not unusual. And when the pointer gets to the the Reserve area, I still always have at least 3 gallons in the tank. I go more by my odometer with the gas gauge more just being an approximation.
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Old 09-16-2008, 04:42 PM   #15
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lol 140 wow thats horrible. ive noticed that once the needle gets about half way it takes forever to drop to "e" but from full to half its gone by the time i get down the street
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Old 09-16-2008, 05:46 PM   #16
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I switched from the stock tires to 32's and immediately lost 5 miles per gallon along with a severe loss of top speed. I did not change gearing and have not calibrated the speedometer so the readings I'm seeing are not accurate. My speedo is off by 10 MPH at an indicated 60 I'm actually going 70 so the odometer is also off by an amount that someone much smarter than me can probably calibrate.
I'm about to switch to the winter tires so will gain the MPG and top speed back soon. Seems like we sacrifice one thing to gain another.
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Old 09-16-2008, 06:43 PM   #17
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I switched from the stock tires to 32's and immediately lost 5 miles per gallon along with a severe loss of top speed. I did not change gearing and have not calibrated the speedometer so the readings I'm seeing are not accurate. My speedo is off by 10 MPH at an indicated 60 I'm actually going 70 so the odometer is also off by an amount that someone much smarter than me can probably calibrate.
I'm about to switch to the winter tires so will gain the MPG and top speed back soon. Seems like we sacrifice one thing to gain another.
Gaining back top speed for winter doesn't sound safe!

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