Lifted gas mileage thread

Ponyracer

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what are you all getting? Post up your mileage and setup.

Jku
Sport s
3.45 gears
8 speed auto
37” nitto terra grapplers 36” tall
Drop in air filter
High flow muffler
Steel bumpers front and rear, no winch
5500 miles
Mix city and highway
Also hand calculated

VERY happy with this jl. My jk rubi got 14 with 315 tires

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Dewey

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JLUS automatic trans on 35x12.5 Nitto trail graplers getting 14.5 mpg during 90% city driving. If you didnt re-cal your speedo you may be tricking the system. Just sayin.
 

Saejin

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I was thinking the same thing about the speedo. Even if he did a hand calc the miles would still be off.

Do you have the dealer adjust speedo for 37” tires?
 
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Ponyracer

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Forgot to add that I installed the flash cal a few days ago. I’ve been running it without correction for awhile. Def saw a difference in tranny shifting and obviously the speedo.
 

andeee

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I was thinking the same thing about the speedo. Even if he did a hand calc the miles would still be off.

Do you have the dealer adjust speedo for 37” tires?
x2 for this question. i'm thinking of having the dealer do it if its cheaper than buying the flashcal
 

1quick1

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2018 JLU Sport S
3.45 gears
8 speed auto
315/70/17 BFG KO2's so about34" tall had dealer flash to 34" so speedo is correct
2.5" EVO Stage 1 boost
8500 miles
Mix city and highway

I get 19.0-19.7 consistently.

The computer read 22.7mpg when I got home from Ouray last night but it's usually not that high unless going 55-65mph consistent.
 

Joe Paul

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2018 JLU Sport S
3.45 gears
8 speed auto
315/70/17 BFG KO2's so about34" tall had dealer flash to 34" so speedo is correct
2.5" EVO Stage 1 boost
8500 miles
Mix city and highway

I get 19.0-19.7 consistently.

The computer read 22.7mpg when I got home from Ouray last night but it's usually not that high unless going 55-65mph consistent.
I'm getting 17.5+ city/hwy with Mopar 2", 35X17 TOYO....calibrated. Was seeing 20+ with stock 32".
 

1quick1

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I'm getting 17.5+ city/hwy with Mopar 2", 35X17 TOYO....calibrated. Was seeing 20+ with stock 32".
I wonder what the weight difference between the KO2 and TOYO's. Plus I wonder if yours are closer to a true 35" where mine really are closer to a 34" when on the Jeep.
 

Joe Paul

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I wonder what the weight difference between the KO2 and TOYO's. Plus I wonder if yours are closer to a true 35" where mine really are closer to a 34" when on the Jeep.
Good question....the wheels are 9"...I would have to measure, but most likely they settle a little.
 

Sloxkhart98

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I’ve got the mopar lift, 37x12.5 Nittos and 4.10 and am getting 15-16 after the FlashCal.
 

NathanG

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16.5 mpg city on 35x12 ko2 and most lift. Lost 1.5 mpg after tires and lift.
 
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Ponyracer

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I’ve been driving up the NorCal/Oregon coast and have been getting 18.6-19 hand calculated. Loving this thing!
 

WXman

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2018 JLU Sport S
8-speed auto
3.45 gears
285/75-17 KO2s (34x11.50) LT-E (61 lbs. each)
17x8.5" Lonestar wheels
2.5" RC lift
Hardtop with towing package and a couple other options.

Seeing 19.7 MPGs on a routine of 50/50 city/highway weekly.

FANTASTIC fuel economy. To put this into perspective, my 2012 JKU Pentastar manual trans got 19.2 MPGs 100% stock! This one is beating that lifted and shod with heavy tires. My wife's 2018 Cherokee 4-cylinder gets about 20 MPGs. These JL Wranglers are amazing.
 

WranglerMan

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JLU Sahara
8 Speed A/T
Stock gears
315/70R17
17x9 Method MR312's
2.5" RC Budget Boost

Was getting 20.5 on avg with all stock but since it got lifted and changed out wheels and tires it's dropped to 19 which seems like a hard hit, speedo has been adjusted with Tazer and its pretty close as speedo says 65 and GPS says 66

So is this considered above avg, below or normal, I don't see 8th gear that much but also have not been on any long trips and the 19 mpg I'm seeing is driving in/out of DT Houston so its kind of a mix of speed especially during rush hour.
 
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