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Old 04-17-2013, 11:16 PM   #1
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Looking for a jeep. Got questions.

Ok guys. Before u tear me up, yea, I've searched this site for some time before I decided to post.

I am looking to buy a 2013 wrangler unlimited. Either a Sahara or the freedom edition. I am unsure as to how high a lift I will be adding. This will be my daily driver.

Here is my question, what kind of gas mileage can I expect with a 2.5 and 3.5" lift? Possibly 33 X 10.5 tire depending on looks. From what I know the new motors from 2012 and 2013 get better mileage, but how much better. I drive 44 miles one way to work, all freeway (driving about 80mph).

Most posts I have read on this topic just post their mpg's but don't specify speed.

Thanks for your help and any other info u think I might need

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Old 04-17-2013, 11:30 PM   #2
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First the size of the lift has nothing to do with gas mileage. It is all about gears and tire size!

At a minimum you will want the factory 3.73 gears. As you have read mileage is directly tied to how you drive, if you take it easy, drive on flat ground both ways and run 33's you may get 16+ . Drive hard up hill in the wind on 35's and your looking at 10-11. The bottom line is this..... your not buying a jeep for gas mileage.

With all my mods and 35" tires my mpg runs from 11.5 (driving hard) to 15 ish ( taking it easy)

And I average 14 driving 55 miles to work at 75-80

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Old 04-17-2013, 11:37 PM   #3
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Just bought our Jeep JK a couple weeks ago and here are some real time stats...as Dark said, lift has nothing to do with mileage, oversize tires are a whole different animal though...stock I was seeing 18.5-19.2 with mixed driving...switched to 285/70/17 MTs and now the mileage for similar routes is 16.5-16.9.....do I care?? Not even a little because buying a Wrangler for MPG is like buying a hammer to cut wood...just doesn't work well!
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Old 04-17-2013, 11:45 PM   #4
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Yeah I know, jeeps and good gas mileage don't go together. But if its gonna get me 12mpg I just can't do it. So I'm just doing as much research as I can first.

Good call on the big tires being the factor is gas, I forgot to specify that. I thought a 33 by 10.5 would be a little better that a 33 by 12.5. But just a initial thought.

My freeway drive is pretty flat both ways. But I do drive it at 80 mph

Thanks again fellas. Keep the info coming please.
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Old 04-17-2013, 11:51 PM   #5
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I just did 340 miles each way to Moab, mostly up hill there and down hill back. I towed my little trailer (see pic) and did 75mph both ways. I averaged 13.5 mpg on both legs of the trip. I have a 3.5" lift duratrac 315 75/16 tires, A banks air intake and exhaust (which does not help you mpg)
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Old 04-17-2013, 11:59 PM   #6
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Quote:
Originally Posted by Dubler View Post
Yeah I know, jeeps and good gas mileage don't go together. But if its gonna get me 12mpg I just can't do it. So I'm just doing as much research as I can first.

Good call on the big tires being the factor is gas, I forgot to specify that. I thought a 33 by 10.5 would be a little better that a 33 by 12.5. But just a initial thought.

My freeway drive is pretty flat both ways. But I do drive it at 80 mph

Thanks again fellas. Keep the info coming please.
I agree sometimes we must face the fact that dollars plays a role in our enjoyment(argh)....I think driving 80 with big tires is going to net you less than favorable results....here's a thought just to ponder,,,rent a Wrangler for the day even in stock form and do your commute...you may find out the wind noise at 80 is unbearable and the MPG flat out sucks...but you may be pleasantly surprised for which you will end up a the dealer plunking down some serious coin for some serious fun!! Just for the record mine isn't a daily driver that's why I don't get too worked up over the MPG.
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Old 04-18-2013, 12:04 AM   #7
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Lift does effect gas mileage but not a whole lot with a brick like a Jeep. Drag is effected by under vehicle air flow. 2.5" lift with 33's will probably cut your mileage by 3 to 4 mpg. If you get real heavy tires like Nitto it could hit you another 1 to 2 mpg. 10.5" tires will help with rolling resistance over a 12.5" tire and cut weight. Light weight 33X10.5 will probably help from losing as much MPG's though but the 12.5's look better and are hard to resist, lol. 3.5" lift will probably make the 33's look small and will effect drag even more. 2.5" will be plenty for 33's. 3.5" if you want 35's in the future.

If you are going to lift and get bigger tires make sure to get the 3.73 gears on the Sahara and not the 3.21. That will help a little.
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Old 04-18-2013, 12:07 AM   #8
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Saw an interesting chart comparing the speed/HP/fuel consumption of the 1001 HP Bugatti Veyron a few years ago.

IIRC, they said it took only about 150HP to get it up to 100 mph....then another 250 HP for the next 50 mph....then another 600 hp to gain the next 100 mph. Fuel consumption also became a logarithmic function rather than merely arithmetic increase.

Good luck on finding a satisfactory combination.
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Old 04-18-2013, 12:13 AM   #9
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Prior to my Jeep I was driving a Lincoln MKX, when I got on the highway I'd set cruise at 125km/h (about 77-78mph) and sit there happily all day. Since getting the Jeep, I set cruise at 110km/h (a little under 70mph). Different vehicles feel right at different speeds, and the funny thing is my drives are much calmer, I find myself getting far less annoyed at other drivers, and I've noticed no appreciable difference in my journey times.

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