MPG - List your rig and your MPG -

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post #1 of 87 Old 08-10-2008, 09:23 AM Thread Starter
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MPG - List your rig and your MPG

Ok, so I'm curious to see what everyone else is getting on their rig and/or what they've done to help with MPG.

My rig is a 4.0, inline six with 42RLE auto. transmission.

Mine when stock:

15 - 15.5 MPG - Automatic 42RLE, 3.73 gears, 30x9.5 GSA Wranglers

Mine after mods:

11.5 MPG - 3.73 gears, 3-4" lift, 32x10.5 Super Swamper Radials

I lost a whole lot of gas in the mod process which bewilders me.
According to this chart, I should be getting the most fuel economy with 32" tires but, obviously, I'm not.

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2005 Patriot Blue Rocky Mountain Edition Wrangler
OME HD ZJ/LJ Combo Lift, OME Long-Travel Nitrocharger shocks, AA SYE + CV DS, Nth Degree Mobility TT, JKS Adj. Rear UCAs, JKS Adj. Front & Rear LCAs, JKS Adj. Front & Rear Trackbars, JKS 'Quicker' Discos, 33x10.5 KM2s on Stock Ravines, Warn Front and Rear Bumpers, Bestop Tinted Window Kit.

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Foglight Switch Operation & Pin-Out
OME HD Coils - Let's End the Confusion!!
JK 'style' bumpers for TJ? Do they even exist?
Caster? Pulling to right after lift...
LED Third Brake Light made out of a Tic-Tacs Box

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Last edited by stunner; 08-10-2008 at 12:10 PM.
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post #2 of 87 Old 08-10-2008, 09:32 AM
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2000 TJ Wrangler 
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The guide is just that, a guide, it doesn't portray actual figures or specific results per mod, being that there can be multiple factors that effect gas mileage.

I'm getting 16mpg on 33x12.50R15 MT and 3" of lift with 4.56 gears. I think I have a cracked exhaust manifold, so hopefully it will go up when I get that fixed.

2000 Solar Yellow TJ
2000 Ford F250 Super Duty
2006 Volvo S40
1997 Arctic Cat ZRT 600

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post #3 of 87 Old 08-10-2008, 09:35 AM
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Tj. 31" tires. 4.10 gears. Manual transmission.


I saw no change after switching from 3.07 gears to 4.10 gears.
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post #4 of 87 Old 08-10-2008, 09:44 AM
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mine gets around 16 still with 33s.. i may have gotten like 17 at the most before lift.. so 1mpg doesnt really bother me.. now before i changed the speedo gear or even knew about a speedo gear i was getting like 11.. did you change your speedo gear?
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post #5 of 87 Old 08-10-2008, 09:57 AM
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4 banger, 4.88's, 33x12.50 I get about 17mpg

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post #6 of 87 Old 08-10-2008, 10:09 AM
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2001 TJ Wrangler 
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4.0, 3.73, 33x12.50, 5 speed i get about 17 to 18 by shifting under 2k rpm's
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post #7 of 87 Old 08-10-2008, 10:25 AM
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05 2.4, 6 speed, 4.10 stock tires with no lift: 18-19 city

06 KJ 4x4 65th Anniversary-
06 Wrangler 2.4l (sold)
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post #8 of 87 Old 08-10-2008, 10:30 AM
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06 4.0, 6-speed, 4.88's 4.5" Rubicon express lift, 35's, armor. 14 city - 16 highway

when it was stock i had no problem pulling 20mpg

im in the process of acquiring parts for a 4.7L Stroker so we'll see how things turn out with mpg

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post #9 of 87 Old 08-10-2008, 11:06 AM
john NC
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2.5" OME, 42RLE 4-speed auto, 3.73 a couple skids, 33x10.5

12-14city which is the majority of my driving, just did a 250 mile trip and got 18mpg with cruise control

Last edited by john NC; 08-10-2008 at 11:22 AM.
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post #10 of 87 Old 08-10-2008, 11:12 AM
2005 TJ Wrangler 
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2.5 OME, Auto, 3.73's, 33 x 12.5 -- 11.0 city
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post #11 of 87 Old 08-10-2008, 11:19 AM
Jerry Bransford
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That "better" gas mileage column doesn't mean you'll get better overall mileage, it just means you'll possibly get better mileage than with the ratios shown in the other two columns. There's no free lunch where bigger/heavier/harder-to-turn tires under a lifted Jeep encountering more wind resistance is concerned.

Getting Savvy...

When you have a choice, buy American.
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post #12 of 87 Old 08-10-2008, 11:20 AM
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2000 TJ Wrangler 
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00' 2.5L 4spd, 4.11 gears, 32" Goodyear MTRs
15-17 mpg combined

Your swampers probably have twice the rolling resistance of the GSAs.
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post #13 of 87 Old 08-10-2008, 11:23 AM
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1997 TJ Wrangler 
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97 4.0L TJ. 4" lift, 31" all-terrains. 18 mpg. Mostly because I drive in the open country. 13 or so city.
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post #14 of 87 Old 08-10-2008, 11:28 AM
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2003 TJ Wrangler 
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'03 with 4.0, manual, 3" lift, 32" tires, 4.10s, lots of city driving and heavy foot - ~12mpg with a hard top on.

Gets about 12.5 with the soft-top. Was getting about 13 before the roof rack, tire carrier bumper, armor, etc.

2003 TJ Wrangler
1981 CJ-7
1959 Willys Wagon L6-226
1955 Willys Wagon SBC
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post #15 of 87 Old 08-10-2008, 11:47 AM
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1979 CJ7 
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Location: Little River, SC
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97 with a barage of CEL and sensor problems--2.5 ax5 w/4.11's and a 2"bb with stock rubi tires and wheels. 15mpg no matter what. Oh, but I do have one of those new fangled airaid intakes that the PO put on. That must have given me a good extra 40 horses at the rear wheel!


Build Thread: 1979 CJ7 Blue Jeep
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