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Old 08-26-2014, 08:50 PM   #1
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Fuel milage loss with lift??

Wondering whether or not you will lose fuel economy with a 2 or 2.5 inch lift on stock Sahara tires? What can I expect to lose? Any people with this setup?
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Old 08-26-2014, 08:52 PM   #2
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Yes you will lose mileage. You're making the bad aerodynamics of a Jeep worse. Just a lift by itself won't be huge (probably less than 1 MPG) but it will be measurable.

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Old 08-26-2014, 08:53 PM   #3
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Not much...and if you do, just get a tuner. I have bigger tires and a lift and get 18 to 20 mpg regularly.
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Old 08-26-2014, 09:19 PM   #4
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Yes you will lose mileage. You're making the bad aerodynamics of a Jeep worse. Just a lift by itself won't be huge (probably less than 1 MPG) but it will be measurable.
Agreed. I personally believe that you should get only as much lift as you need. WIth the stock wheels do you really need 2.5"? You could run 35s with that. If you are going to run close to stock tires I would probably look at leveling kits or spring upgrades.
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Old 08-26-2014, 09:23 PM   #5
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Agreed. I personally believe that you should get only as much lift as you need. WIth the stock wheels do you really need 2.5"? You could run 35s with that. If you are going to run close to stock tires I would probably look at leveling kits or spring upgrades.
That's what I was thinking. What's your opinion. Should I just upgrade tires on the same wheels?
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Old 08-26-2014, 09:31 PM   #6
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I personaly are going to stick with stock wheels. I will upgrade to Rubicon takeoffs which are the same size as my stockers now and I think I will max out at a solid 33" with those tires. narrow 33s should be fine on stock height so I am would do a 1.5 for my self at max probably just a spring swap like the RKs a lot of people have done. I am not an expert by any means but I have looked in to it a over the past couple of months.
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Old 08-27-2014, 12:07 AM   #7
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Wondering whether or not you will lose fuel economy with a 2 or 2.5 inch lift on stock Sahara tires? What can I expect to lose? Any people with this setup?
When I did my 2.5" lift I saw only a slight difference in fuel economy. At most it was a 5% hit. Once I added 305/70/17 (34s) M/T tires, heavy bumpers, winch and under side armor it went to a 10% hit. That is as long as I stay around 70mph/112kph on the frwy, any more than that and it gets dismal fast.
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Old 08-27-2014, 10:45 AM   #8
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Agreed. I personally believe that you should get only as much lift as you need. WIth the stock wheels do you really need 2.5"? You could run 35s with that. If you are going to run close to stock tires I would probably look at leveling kits or spring upgrades.
For my own needs, I don't disagree. I got a 2.5" lift only because I needed it to fit 35's and I still rubbed on the factory front fenders at full stuff so I got flat fenders so I didn't have to lift any more. Well, I went with Poison Spyder crusher flares because I take my Jeep off road and I knocked one of my plastic factory fenders loose so I needed something that could take a hit better.

But there are some people who like the look of a little bit of lift and they don't mind the small hit to the mileage. And if they like it, more power to them. Everyone's Jeep is their own and it would be a boring world if everyone did the exact same thing to their Jeeps.
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Old 08-27-2014, 10:50 AM   #9
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When I did my 2.5" lift I saw only a slight difference in fuel economy. At most it was a 5% hit. Once I added 305/70/17 (34s) M/T tires, heavy bumpers, winch and under side armor it went to a 10% hit. That is as long as I stay around 70mph/112kph on the frwy, any more than that and it gets dismal fast.
You be surprised how much your economy would improve if you kept it under 65. But that's true no matter how much lift you have, how big your tires are, or what accessories you have on your Jeep.

I get 17.x on the freeway at 70-75. If I go 60-65 that bumps up towards 20 (I don't know the exact number because I rarely do it) and I have 35's and a big winch bumper on the front as well.
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Old 08-27-2014, 10:56 AM   #10
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I have an AEV 3.5 with 35 BFG. I went down 3 mpgs...like someone said, keep it below 65 mph
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Old 08-27-2014, 10:58 AM   #11
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I've had a 2.5" on mine, same tires as before the lift (31x10.5)and have the same mileage...no diff at all...Once I throw the 32's on, I suspect it will drop an MPG or 2, but not much.
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Old 08-27-2014, 11:14 AM   #12
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I have a 2" leveling kit, noticed about 1mpg drop from the kit install. I think removing the factory rake has more todo with a drop in economy than the actual height does. I cannot imagine, if my Jeep set the same level but 1" taller, I would notice any more drop to my fuel economy.
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Old 08-27-2014, 02:24 PM   #13
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You be surprised how much your economy would improve if you kept it under 65. But that's true no matter how much lift you have, how big your tires are, or what accessories you have on your Jeep.

I get 17.x on the freeway at 70-75. If I go 60-65 that bumps up towards 20 (I don't know the exact number because I rarely do it) and I have 35's and a big winch bumper on the front as well.
Yes you are right about the speed vs mpg, your numbers are right in there with what I am seeing. I used % because the OP is in Canada and they use the whole metric thing up there. Thought it would save him time with doing the conversions.
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Old 08-27-2014, 02:54 PM   #14
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Originally Posted by Hivedr View Post
When I did my 2.5" lift I saw only a slight difference in fuel economy. At most it was a 5% hit. Once I added 305/70/17 (34s) M/T tires, heavy bumpers, winch and under side armor it went to a 10% hit. That is as long as I stay around 70mph/112kph on the frwy, any more than that and it gets dismal fast.
I don't think 5% or 10% make any difference for a Jeep. We are getting bad mpg anyway, 1 mpg difference won't hurt much.

However, for other cars which can mean 40+ or less that could make a huge dent to the sales, car manufacturers have spent thousands of money in research or tweaking just to make 1 or 2 mpg better.
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Old 08-27-2014, 03:39 PM   #15
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I run Duratracs (stock tire size) on a TF leveling kit, watch my speed and I'm generally showing 18.5-19.0mpg on the dash display.. I'm too lazy to calc it out by hand. I drive a lot of 45-55mph roads and just cruise, don't punch it past 65 really on the highway which is crazy since my last speeding ticket in previous car should have been 118mph, they wrote it down to 84mph so I didn't have to go to court... I don't have this problem in a jeep now!

I have a Superchip tuner and have gone back to stock as a test and seeing better MPG w stock tune btw. I may go in and let it do the stock tune with superchips throttle response. But All the other tunes keep giving me 16-17.5mpg.
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Old 08-27-2014, 04:26 PM   #16
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I run Duratracs (stock tire size) on a TF leveling kit, watch my speed and I'm generally showing 18.5-19.0mpg on the dash display.. I'm too lazy to calc it out by hand. I drive a lot of 45-55mph roads and just cruise, don't punch it past 65 really on the highway which is crazy since my last speeding ticket in previous car should have been 118mph, they wrote it down to 84mph so I didn't have to go to court... I don't have this problem in a jeep now!

I have a Superchip tuner and have gone back to stock as a test and seeing better MPG w stock tune btw. I may go in and let it do the stock tune with superchips throttle response. But All the other tunes keep giving me 16-17.5mpg.
... I don't get it, you getter better mpg with superchip or without ..
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Old 08-27-2014, 05:10 PM   #17
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Without is my current experience.

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