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Old 05-03-2010, 07:38 PM   #1
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Does this happen if you add a 3 inch lift to your jeep?

I have heard that when you lift a car or truck or a JEEP ... will it decrease gas mileage?
If so how much of a lift would have an impact on MPG?
I am getting a 2.5 inch Coil spacer lift, will that effected gas mileage a lot? I am also getting 31x10.5 inch Goodyear Wrangler Duratrac's which will definitely decrease mileage, but by how much?


Thanks in advance!

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Old 05-03-2010, 07:41 PM   #2
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Yes of course . . . lifting any vehicle would probably decrease the aerodynamics, not that you have much to begin with on a Jeep, and decrease the gas milage. And going with bigger/heavier tires will also decrease the milage. I run 33s with a 4" lift and I'd be happy to see 14-15 MPG.

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Old 05-03-2010, 07:50 PM   #3
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You won't loose that much with 31's. Keep in mind that your speedo/odo will be off unless you change it to reflect the increase in tire size.. It'll appear to be worse than it really is, because you are going farther than your odo registers.
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Old 05-03-2010, 07:52 PM   #4
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i run 35"s looking to go 37" eventually.i have a 3.5 inch lift and i added a flash pack to help with the gas mileage and im getting 17 m to the gallon, so a recalibration could be the key but with 31's you may not see much of a difference
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Old 05-03-2010, 07:57 PM   #5
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oh i did forget to mention you will need to recalibrate your speedometer though so u know when to change the oil or when not to get a ticket
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Old 05-03-2010, 08:28 PM   #6
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You drive a jeep it like a brick in the wind. If u want gas mileage get a neon
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Old 05-03-2010, 08:37 PM   #7
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Quote:
Originally Posted by yellowjacket View Post
You drive a jeep it like a brick in the wind. If u want gas mileage get a neon
or a prius
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Old 05-03-2010, 08:48 PM   #8
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Or a Civic.
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Old 05-03-2010, 09:15 PM   #9
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Mileage due to a lift will not change gas mileage to the point you could really tell the difference. The loss of mileage comes into play when you have larger tires not from the lift. Just remember you bought a Jeep to drive like a Jeep and not like a hybrid.
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Old 05-03-2010, 09:21 PM   #10
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You drive a jeep it like a brick in the wind. If u want gas mileage get a neon
ive never heard it put that way but deff. true haha.. alot of fun driving a brick on a windy day but wouldnt have it any other way
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Old 05-03-2010, 11:59 PM   #11
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ive got a 4.5inch lift on 33s, and i cruise on the freeway at 55-60 mph max because your mpg decreases rapidly when you go over 60 mph. i calculated the mpg once and it came to roughly 20mpg give or take a few of course. the bigger the lift the less aerodyamic the jeep is...and jeep are pretty square as it is, the bigger tires also cause a loss in mpg. but hey they look badass
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Old 05-04-2010, 03:35 PM   #12
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Can anyone give me a crash course on recalibrating a speedo meter?
Because i don't need the speedo meter to be off, i don't want to get a speeding ticket...
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Old 05-04-2010, 03:44 PM   #13
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31'' tires made my speedo dead on. FWIW (according to my GPS)
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Old 05-05-2010, 07:13 AM   #14
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31'' tires made my speedo dead on. FWIW (according to my GPS)
x2 on this..

and on my truck the speedo and GPS are matched, so I figured it's gotta be close.
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Old 05-05-2010, 07:31 AM   #15
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Originally Posted by 97'wrangler View Post
Can anyone give me a crash course on recalibrating a speedo meter?
Because i don't need the speedo meter to be off, i don't want to get a speeding ticket...
Run it with a GPS to see how far off you are. You can swap the speedo gear with the correct one for your tire size if you really can't adjust to the fact that you are actually going 3-5 mph faster than your speedo says. It's really not that big a deal. Been doing it for more years than you've been driving probably....
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Old 05-05-2010, 07:46 AM   #16
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Old 05-05-2010, 08:16 AM   #17
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Quote:
Originally Posted by 97'wrangler View Post
Can anyone give me a crash course on recalibrating a speedo meter?
Because i don't need the speedo meter to be off, i don't want to get a speeding ticket...
You can also get a new speedo gear. There is a chart with tire size and correct gear out on the internet somewhere.


DOH! already suggested above.

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