MPG change with lift

[Idaho Tracy]

Since my 04 KJ is a daily commuter vehicle, I'm wondering if the OME 2.5" lift alters the MPG stats an appreciable amount? Thx.

 

[duderz7]

The smiles will be worth the lower miles. Really not a huge difference. You're talking about the wind resistance of a brick compared to a brick that's higher.

 

[Rasfetch]

My old liberty had the 2.5" lift on it with stock sized all terrain tires, and I think I lost .5mpg so not much. Ironically, it got better gas mileage than my current liberty. Same engine too.

 

[profdlp]

I may have had a very slight decrease, but as duderz7 says, worth it for the way it rides and looks. I think my heavy roof rack and the big pile of stuff I lug around had a bigger impact.

 

[lfhoward]

The biggest mpg effect will be larger tires. Mine was lifted for 6 months before I got 31’s, and like with Rasfetch’s it was negligible with the stock 29’s. Roof rack basket -1.5, bigger tires -2 to -3, lift maybe -0.5.

Regearing your differentials to 4.10 ratio will put your engine back in the torque band, your transmission will be happier, and you’ll get most of those mpg back.

 

[Idaho Tracy]

Thanks for the good info. I already have oversized tires (245R75) and I get right at 20 mpg.

 

[nbas]

Tyres make the biggest difference. Size and type of tyre... If you change tyres without regearing your MPG will fall more... After regearing i noticed a slight change for the better especially in city driving...
I get 12.7lt/100km (18MPG) on highway with 120-130km/h and approx 16.8lt/100km (14MPG) in city driving (Athens-Greece) with mud tyres. I expect to go better after changing to AT tyres (BFGoodrich KO2)...

 

[Idaho Tracy]

My main interest in the lift is tire clearance. The larger (all terrain) tires rub in any kind of flex situation. I think I'll start with the 4:10 gearing and go from there.

 

[KJowner]

Tyres make the biggest difference. Size and type of tyre... If you change tyres without regearing your MPG will fall more... After regearing i noticed a slight change for the better especially in city driving...
I get 12.7lt/100km (18MPG) on highway with 120-130km/h and approx 16.8lt/100km (14MPG) in city driving (Athens-Greece) with mud tyres. I expect to go better after changing to AT tyres (BFGoodrich KO2)...

Guess that's a V6!

 

[lfhoward]

KJ’s have always gotten better mileage than KK’s for some reason, even though we have the same engine.

My KK, 4 inch lifted, with 245/75R16 BFG KO2’s and a roof rack, gets 17.5 on the highway and 12 in the city. I have not yet regeared (stock 3.73 ratio) and it is an automatic 4 speed transmission.

 

[LibertyTC]

On Highway, I get 15 mpg max. Stock Gearing, 4:10's would help..

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BTW ga$ here is $10 per gallon...

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[DeVilliers]

oooo, I want a guzzler sticker. Where can I buy one online?

I don't recall the 2.5in lift I did making a difference, but the bigger tyres and roof rack certainly did.

 

[LibertyTC]

oooo, I want a guzzler sticker. Where can I buy one online?

I don't recall the 2.5in lift I did making a difference, but the bigger tyres and roof rack certainly did.

Ha ha..You won't find the stickers online. I made the graphics for the forum as a joke.
I suppose you could get a graphics shop to make some quality stickers for the Jeep !
Here is also the simplified version.

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[lfhoward]

Pixeldecals.com has some funny Jeep related stickers available. Here is one about Jeep fuel economy that made me chuckle.

https://www.pixeldecals.com/shop/Offroad-Decals/Other-Offroad-Decals/Not-A-Hybrid-Decal

 

[KJowner]

What about the poison dwarf herself?

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[WheelNut]

I didn't notice any sort of significant reduction in fuel economy when I installed my lift. If I drove on the highway/at high speed more often then perhaps it would be more obvious.

A lift won't help reduce rubbing off road. Your suspension travel is still the same up and down, so the max and min positions of the wheels are the same, but now your neutral point is higher, so you will have more clearance from tire to body when steering on flat ground. When you are fully flexed out the tires will be in the same position as they were when you were flexed out on stock springs. There is one caveat to make there, which is that lift springs are stiffer than OEM springs so you will lose some flex on rough ground in some situations which could lead to less rubbing, but the basic suspension geometry and wheel path through the suspension stroke is the same with or without a lift.

 

[nbas]

Guess that's a V6!

Yes it is!

 

[Idaho Tracy]

One bid I got from a local shop that specializes in suspensions and gearing gave me a price of $2660 out the door, parts and labor. How does that compare to some of your experiences? It is too technical to get it right for me to try it myself. Not every regular shop will even do diff gearing. I may try to check out some other shops.

 

[lfhoward]

It depends on the equipment you’re having them install. If this is for a spacer lift they are ripping you off. The price could be fine if they are buying and installing OME springs, OME or Bilstein shocks, and JBA upper control arms. Some others may have other experiences. The install part of mine (labor only) was $1000. I am in the northeast where prices are higher than in the midwest.