Post your MPG

[ArmyGuy45]

I have seen some posts in the past talking about how to improve your MPG but we really don't have an idea of what is 'normal' MPG. So I figured lets all post up what you are currently getting with what mods you have and what type of driving you do.


MPG: 16.8

Type of driving (city/freeway): 50/50

Mods: Short ram intake with throttle body spacer

4.0L with AW4 with stock tires on 3.55 gears

[abebehrmann]

19mpg if doing all highway. 16mpg if city driving is mixed in.

4.0L with AW4 everything stock, 235x75x15 all season tires.

[drakan1908]

City- 11 mpg with 31 inch mud tires. Stock 355 gears. Don't drive highway much any more but on 235/15 tires I was getting about 22 on the highway. I have a 4.0 with 42re trans. 242 transfer case

Sent from my XT907 using Tapatalk

[Brasscatz]

I was getting between 15 & 17 when it was my daily driver. I drive too much for work, so I bought a 40 mpg civic ;)

Sent from my Samsung Galaxy S4 because my microwave couldn't do it

[bigjim350]

Best Ive got was 18.5mpg on a trip I took down the coast. Thats on 33's with stock 3.55 gears. Only mods on the engine are, exhaust and a performance chip. City/hwy combo is about 14-15

[Pookapotamus]

I'm averaging, 11 mpg

Stroker, 2000 intake, 703 injectors, 33" toyo open country, 4:10's, rear Aussie, cold air intake, and a lot of extra weight, front & rear bumper, sliders, belly skid... Etc

[Mudderoy]

The problem with MPG reports is they are like fishing stories. You have what people "FEEL" is their gas mileage and what it actually is.

For example:
Has the speedo been corrected?
How was the mpg calculated, how often and how long ago?
What is the fuel being used? Ethanol mix? (10%)

With that said...

11/11/13 10.52
11/18/13 11.57
11/15/13 11.75
11/22/13 11.28
11/29/13 10.89
12/06/13 11.26
12/18/13 10.95
12/27/13 11.84
01/02/13 11.90

6.5" lift, 33x15x12.5 BFG MT tires, 10x15 wheels, custom front bumper, winch, custom rear bumper, tire carrier, spare, 100 pounds in frame stiffeners and sliders. Add another 30 pounds for suspension upgrades (lca, uca, shackle drops) I'm in Harris County so we have to use the Ethanol crap (10%)

AW4 transmission

[2001-XJ]

How about gears and tranny type?

[denverd1]

dana, any lift?

Tony, I know you've been tracking mpgs for years. What has each inch of lift meant to your mpgs?

IMO folks have an efficient car or a kickass go-anywhere jeep. not both.

[Mudderoy]

dana, any lift?

Tony, I know you've been tracking mpgs for years. What has each inch of lift meant to your mpgs?

IMO folks have an efficient car or a kickass go-anywhere jeep. not both.

I'd have to go back (it's in a post here somewhere) to have exact information, but my recollection is that when I started measuring MPG was just after the 4.5" lift and 32" tires. It was around 10.2 mpg. After that I went to the 4.56 gears and it's been in the 11.5 to 12 range until the new engine. Then it dropped back to the 10's and recently is back to the 11.5 12 range.

In other words there has been NO CHANGE (+/- .25 mpg) since the original lift and tires. That means bumpers, winch, spare tire, sliders, etc... net MPG change 0.

[denverd1]

would you attribute that to regearing?

[Mudderoy]

would you attribute that to regearing?

Re gearing made the only noticeable, and substantially positive change to my MPG. Between 1 and 2 mpg.

I'm not sure if Matt has actually measured his mpg, but I believe he is seeing the same MPG as I am, however when he was in Colorado using the non special fuel mix he was getting 300 miles to a tank. I get about 210.

[nickyg]

I have 2 inch lift, 31x10.5 tires, A4 tranny, stock gears ,use mostly 10% ethanol fuel. I get 19-20mpg highway, 17mpg city and about 10mpg everywhere else.

[XJ Wheeler]

'92 xj.

Firepower ignition kit, Bosch platinums set to .065 gap, poweraid tbs, custom catback with magnaflow muffler and exhaust leak, spectre air filter, 181k miles.

R.E. 4.5" lift, 31x10.5 bfg all terrains, removed front air dam, trimmed fenders and flares (not sure it makes a difference, but ya never know), rooftop mounted spare. Tried to list the things that could possibly make a difference.

City, is what i do most. 50-55 is the usual top and lots of stops. I seem to be sticking right around 10.5 mpg. Did a short stint of 55~ with only a few stops a few months back and i got 13.5mpg. This is somewhat disappointing to me since i see others getting better with similar mods. Now, i do believe i need to do a couple "maintenance things to it like O2 sensor but we'll see when i do those things. I recently changed the trans fluid, t-case fluid, and front diff fluid and saw no (big or confirmed) change in mpg because of it. It also puzzles me somewhat because a few years ago i clocked 15.5 when i was running my brothers rather badly worn m/t's and hadn't done the engine mods although that was mainly highway. I really would like to see what the highway mpg would be...

Also, i have not reset my speedo so these numbers should be approximately 7% higher.

Sent via messenger pigeon - i talk, he types.

[editedforsafety]

Depends on weather, but I average between 15-16.5 MPG with a mix of city/hw. If it's bitter cold and snowy, I seem to get between 12-14.

[XJ Wheeler]

I've wondered for a while if switching from an aggressive mud terrain, to an all terrain makes any real world difference. Magazines have done it and said yes, actually over 1 mpg...

If anyone has done this test, or is going to be switching tires let us know.

Sent via messenger pigeon - i talk, he types.

[denverd1]

Of course it would make a difference. Less rolling weight

Sent from my Samsung Galaxy S3

[XJ Wheeler]

Of course it would make a difference. Less rolling weight

Sent from my Samsung Galaxy S3

That's true. Tires very so much in weight and thread i wonder how much of a difference. Could make the choice of all terrains that much more of a better investment.

Sent via messenger pigeon - i talk, he types.

[Pookapotamus]

dana, any lift?

Tony, I know you've been tracking mpgs for years. What has each inch of lift meant to your mpgs?

IMO folks have an efficient car or a kickass go-anywhere jeep. not both.

ah yes sorry, 6.5"

I agree with tony, mpg is kinda a fishing trip, i get my numbers from an app called "kilo fuel".

Also should say that I run premium, 94 octane, and bag the shit out of it! only have 2500 kms on it and am still trying to get the extremely hard rings to seat fully.

Pook

and I should mention that mort will be going for a custom tune here soon and i will report my mileage afterwards. and... that's all city and i'm running an AX15

[Steve2kXJ]

STOCK.........MPG: 17.5 City/Hwy 40/60 (309 miles on one tank of gas)

(Engine light code indicates O2 sensor, hope to improve MPG when I swap out the sensor)

[4.3LXJ]

That is still decent milage. The O2 sensor may still be working properly, but when the internal heater goes bad, then the code shows up

[ekaybe]

13mpg 100% city on 235/75/15

I get 230 miles until my gas light turns on

[Firemanray]

<10, I don't even want to know!!! My son drives it to school every day, about 20 mile round trip. He uses 1 tank in 7 days.

[denverd1]

does the gas light operate independently of the gauge? I have low voltage at the sending unit and not looking forward to dropping the tank. could one rely on the light?

[Carves]

Agreed ... on the fishing trip comment.

So many XJs .. all different, driven in different places, differently.

Makes a comparison real difficult unfortunately.

Personally, I think look at say .... 19mpg best ?? ... as a "standard" and then look at the reasons you dont get it.

What would be interesting ... and since theres a bunch here,

... a convoy of Texan XJs ... all driving the same course on a tank of fuel ... and seeing what the MPG results were, for the different setup, vehicles.

Might make a :cool: podcast/vid for XJTalk to lay claim to.

hint hint ... Mr Mudderoy ??


of course - finding enough runners, to be in the convoy ....... might be an issue ?? .. :p .. :D

[XJ Wheeler]

Agreed ... on the fishing trip comment.

So many XJs .. all different, driven in different places, differently.

Makes a comparison real difficult unfortunately.

Personally, I think look at say .... 19mpg best ?? ... as a "standard" and then look at the reasons you dont get it.

What would be interesting ... and since theres a bunch here,

... a convoy of Texan XJs ... all driving the same course on a tank of fuel ... and seeing what the MPG results were, for the different setup, vehicles.

Might make a :cool: podcast/vid for XJTalk to lay claim to.

hint hint ... Mr Mudderoy ??


of course - finding enough runners, to be in the convoy ....... might be an issue ?? .. :p .. :D

I'm down for a xjtalk convoy! :D

Sent via messenger pigeon - i talk, he types.

[cantab27]

ita a jeep ,,its got a ugly old v8 in it ...i drive it like i stole and dont care about MPG,,,,,,,,


that grin makes up for the lack of MPG ,,,,,


http://i469.photobucket.com/albums/rr52/cantab27/westport%202012/066.jpg (http://s469.photobucket.com/user/cantab27/media/westport%202012/066.jpg.html)

mind you does spend a bit of time on one of these , so sometimes cheap as to run.....:smiley-laughing021::smiley-laughing021:


http://i469.photobucket.com/albums/rr52/cantab27/westport%202012/SAM_1857.jpg (http://s469.photobucket.com/user/cantab27/media/westport%202012/SAM_1857.jpg.html)

[denverd1]

love going home with a dirty left arm and a smile on ma face!!! :D:D:D

[Ornery]

1988 Base model. 4.0, 5 speed manual. Bone stock. I just drove over 500 miles on the highway with a fair load onboard and got 22.7 mpg. 215x75x15 tires. I have no idea what the gear ratio is yet. I recently purchased it from its original owner. City driving gets me 18.6 mpg. I'm not an aggressive driver, stay the speed limit, ease in and out of stops. I'm going to replace a leaky valve cover gasket, change the air filter and put new plugs in it and see what she will do. I'm shooting for 24 mpg highway.

[ches30]

My 99 4.0 auto stock got about 18mpg in town. with 31-10.5 pro comps and 2 in lift 16mpg. Now it has 3 1/2 lift and an intake temp mod, I drive hard all the time . Mpg suck now.


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[Spike3]

93 with 3" lift, 31x10.5x15 tires, 3.55 gears, AX15 transmission, 703 injectors.
I get 19mpg highway, 12-13mpg city.

Sent from my SGH-I747M using Tapatalk

[Ornery]

I'm going to keep "cleaning it up" and try to get the city mpg's to 19 and the hwy mpg's to 24 before I start making any off road changes. It will be my daily driver, but if I need to go off road, I want to be able to. This is my first Jeep. I drove the M1A1's, but this Cherokee is quickly becoming my favorite rig. Very versatile. I just don't want to give all my money to the gas station. I've got light duty truck tire/SUV tires on it for now. When they wear thin, I will probably move to an All Terrain tire.

[Pookapotamus]

Well a little update to my mpg, the stroker is breaking in nicely and the mpg has climbed from 11 up to 12.5.

[Rocco83]

Well a little update to my mpg, the stroker is breaking in nicely and the mpg has climbed from 11 up to 12.5.


I do not envy you sir. Can't wait to throw a full tank of gas in mine so I can check the mpg. The engine is pretty much brand new so I'm thinking it should be pretty decent.

[thetoulman]

99 xj, 4.5" lift, 33x10.5 tires, 4.56 gears, aw4, best I've seen was 18mpg, usually 15ish

[Mudderoy]

6.5" lift, 33x12.5x15 tires, 4.56 gears, aw4, Mine has been cycling between 11.25 and 12.0 mpg

I should add customer front and rear bumpers, with winch and spare tire with carrier. Oh and frame stiffeners and sliders. I've probably added 300 lbs in armor.

[Carves]

18mpg U.S...... todays highway run.

30x9.5,
2" lift,
4.10 diffs,
AW4,
6" high roof basket,
Trailer full of shyte,
65mph,

.... and over due for a tuneup .. :o

[dagod16]

I get 19.4 MPG according to my little digital thingy. No Mods, and I drive 90% highway 10% city

I've checked it the old fashion way and it's right on!

I have a toyota corolla or a honda civic in my future after xmas. If I got 13-15 MPG on my jeep I would kill myself. I would have no money.

Soon(after xmas) the jeep is going to be the backup vehicle and I will have fun upgrading it for my son in the future.

The fully loaded toyota corolla will get about 40 MPG which is awesome.

My son is going to get a fully funned up Jeep for his starter vehicle! Crazy lucky kid. Just crazy. Good thing he gets straight A's. With his luck his girlfriend will be hot and slutty!

: )

[gary63]

I hair about the motor and fuel mods. people do to try and get better mpg but has anyone tryed rebiulding the tran. and maybe adding a shift kit. The older the trans. get more slipage it has and it take alittle longer to lock up.I know on other thing when I redid the trans. my mpg went up. So that is on my list of things to do and trans-go has a shift kit for the aw4.

[Mudderoy]

I hair about the motor and fuel mods. people do to try and get better mpg but has anyone tryed rebiulding the tran. and maybe adding a shift kit. The older the trans. get more slipage it has and it take alittle longer to lock up.I know on other thing when I redid the trans. my mpg went up. So that is on my list of things to do and trans-go has a shift kit for the aw4.

When mine was rebuilt a couple of years ago they installed a heavier duty torque converter and a shift kit. 11.25 to 12 mpg.

[JeepFreak]

18.61 MPG average

[gary63]

When mine was rebuilt a couple of years ago they installed a heavier duty torque converter and a shift kit. 11.25 to 12 mpg.

getting the right torque converter that work with your cam and gears is very importin also I'm with you on body armer I'm adding some and it will add weight so getting everything I can out of hp tork and mpg will maghter.

[Ornery]

This Cherokee has the 5 speed manual transmission. I think that is helping a lot. It was a rust free, one owner rig. No modifications made to it, base model. Doesn't even have the roof rails. Pretty light vehicle.

[Mudderoy]

getting the right torque converter that work with your cam and gears is very importin also I'm with you on body armer I'm adding some and it will add weight so getting everything I can out of hp tork and mpg will maghter.

That's what everyone says, but it's been 11.25 mpg to 12.50 since I went to the 4.56 gears. I don't think that weight, at least in my XJ's case has made ANY difference at least nothing over .5 mpg.

[gary63]

I was told the same thing on weight so I added 500 lb. in the back and drove round and didn't make that much of a deffrents that is why i"m adding the armer for safty.

[Mudderoy]

I was told the same thing on weight so I added 500 lb. in the back and drove round and didn't make that much of a deffrents that is why i"m adding the armer for safty.

Don't get me wrong I'm sure if you added enough weight it would start making a difference, but I haven't got there yet. :bacondance:

[gary63]

I agree if the small amount of weight that people put on a street and trail rig should not both it most of them are set up to have 4 people and gear if you only have 2 people and some gear you have room to add weight. As for mpg the new rigs may get more but they have alot more things to go wrong and they need alot more to keep them to gether. So just use good parts and keep your rig tuned up and they will ruun the new stuff in to the ground. also if you check most of the new rigs have smaller tanks to lighten them up.

[Ornery]

I'm guessing your rigs were heavier to begin with? Larger wheels and tires, auto transmissions, grill guards, spare tire carriers. I do have the 13 gallon fuel tank, which in the future I would like to modify to take 20 gals. My tires aren't all terrain or off road either. I'm running factory 15" wheels and original size tires on this 25 year old girl. What kind of mileage were you getting before you changed the gears and what was in before?

[JeepFreak]

I get 19.4 MPG according to my little digital thingy. No Mods, and I drive 90% highway 10% city

I've checked it the old fashion way and it's right on!

I have a toyota corolla or a honda civic in my future after xmas. If I got 13-15 MPG on my jeep I would kill myself. I would have no money.

Soon(after xmas) the jeep is going to be the backup vehicle and I will have fun upgrading it for my son in the future.

The fully loaded toyota corolla will get about 40 MPG which is awesome.

My son is going to get a fully funned up Jeep for his starter vehicle! Crazy lucky kid. Just crazy. Good thing he gets straight A's. With his luck his girlfriend will be hot and slutty!

: )

Yeah he'll get all the hot and slutty covered in muddy chicks ;D

[JeepFreak]

And welcome to the site, Ornery :D glad you could join us!!!

[Ornery]

What is the best mpg that any of you have heard out of an older Cherokee with the 4.0?

[ArmyGuy45]

What is the best mpg that any of you have heard out of an older Cherokee with the 4.0?

25 mpg with a 5spd.

[Mudderoy]

I'm guessing your rigs were heavier to begin with? Larger wheels and tires, auto transmissions, grill guards, spare tire carriers. I do have the 13 gallon fuel tank, which in the future I would like to modify to take 20 gals. My tires aren't all terrain or off road either. I'm running factory 15" wheels and original size tires on this 25 year old girl. What kind of mileage were you getting before you changed the gears and what was in before?

I started keeping track of my mpg right after the 4.5" lift tires and wheels were installed. I was getting about 10.5 mpg. So that was before any other mods. Many mods later the mpg hasn't changed since the 4.56 gears were installed when it increased the mpg 1 to 2 mpg.

[XJMikey]

13.4 hwy with 3.55 gears, 31's, fram dropin filter and dynomax cat-back.

I don't know what my city mpgs are. I'm not allowed to drive in the city anymore. According to my fiancee, people don't like: being flipped off, honked at, sprayed with silly string, recorded while being a ****tard, or told to shove their shitty driving up their mother's ****, and swallow.


Edit: mileage per fill up was measured and recorded with my Garmin GPS, not the inaccurate odometer or trip meter.

[JeepFreak]

What is the best mpg that any of you have heard out of an older Cherokee with the 4.0?

I got a 1994 Cherokee and it's gotten 26 MPG before. Not quite sure how BUT the O2 Sensor had been really really old so it must have made it really lean.

[Ornery]

25 and 26 on the high end. Okay, that's grey mileage as far as I'm concerned. When I got my Cherokee, everyone kept telling me how poor the mileage was going to be. 10-12 mpg. I knew this one was beating that by a long shot. I'm pleased. Thanks!

[Mudderoy]

I think I may have posted this a while back, but let me repeat. :D

When calculating MPG you need the following.

1) An accurate odometer. - Changing tire size or differential gears change the odometer and therefore your MPG calculation. Why? It changes the measured distance. Making the odometer show a mile when less, or more has been driven. MPG = Miles Per Gallon.

2) Just because you have a 18 gallon tank (or 15) doesn't mean that is how much you used to travel a measured distance. For your MPG calculation the amount of fuel used over the measured distance needs to be measured, not guessed at. Miles Per Gallon <=== not Guesses ;o)

So how do you calculate MPG?

Simple! On your next fill up...

1) Make note of your odometer reading. Save it.

Drive a week a day whatever....

2) Make a note of your odometer reading, it should be a larger number than it was from step 1! :D

3) Subtract odometer reading (step 2) from odometer reading (step 1) This is the number of miles you have driven.

4) Now fill up your vehicle. Note the number of gallons it took to fill the tank. This is how many gallons it took to drive the distance you just calculated.

5) Great! We can calculate the MPG (Miles Per Gallon) Divide the number of miles driven with the number of gallons from this fill up.

Example: 205 miles / 17.69 gallons = 11.58846 Miles Per Gallon! This is your MPG.

** Now you can use a GPS to gather the distance information, and I believe some GPS units will calculate MPG for you. Personally I would calculate it manually at least once to confirm the GPS unit is doing it correctly. No I don't know they did it wrong, but it may be set up incorrectly, etc...

If you are NOT measuring your MPG accurately then you might want to mention it in your post. Otherwise people will believe the numbers you are providing are accurate.

[gary63]

biuld it to your driving needs big tires big flat things like bumpers and brush gaurds or and boxy roof rack can drop mpg but if they help you do what you want to do with you XJ then go for. People with smart cars get great mpg but if they want aweek of groasherys they have to make 3 trips and in the winter going though snow hills bring a shuvel.

[Mudderoy]

biuld it to your driving needs big tires big flat things like bumpers and brush gaurds or and boxy roof rack can drop mpg but if they help you do what you want to do with you XJ then go for. People with smart cars get great mpg but if they want aweek of groasherys they have to make 3 trips and in the winter going though snow hills bring a shuvel.

Of course but the point of this thread is to see what MPG people are getting. This helps people get a better understand of what MPG is possible with the mods we have made. How else will you know what to expect? The EPA never tests modify rigs. ;o)

[gary63]

will I have a friend who drives he's XJ only to work and home in all kines of weather he drives about 2hr both way everyday he is getting he's XJ up to 30-32 depending on weather but he will tell you as for anything pass a gravel road forget it but he wouldn't give up he's XJ. He is going to rebiuld it and when he find a nother one he like he will make a trail rig.

[JeepFreak]

My OVERALL average is 18.61 MPG like I said. I can drive at freeway speeds and go 300 miles+ on a single tank. I believe my tank has 17 gallons damn near about. Even when it got to the point where it was sputtering from very little gas (bad money week), it filled up to only about 17.3 gallons. Odd because the manual says I have a 20 gallon or a 22 gallon tank. Chrysler, always overclocking their vehicles lol

[XJMikey]

My OVERALL average is 18.61 MPG like I said. I can drive at freeway speeds and go 300 miles+ on a single tank. I believe my tank has 17 gallons damn near about. Even when it got to the point where it was sputtering from very little gas (bad money week), it filled up to only about 17.3 gallons. Odd because the manual says I have a 20 gallon or a 22 gallon tank. Chrysler, always overclocking their vehicles lol

Mine has a 20 gallon tank. I only ever put 16-18 gallons in, but last summer after I cleaned my tank and installed a new fuel pump, I refilled the tank using (4) 5 gallon canisters. When I started it up, my gauge read spot on F.

[JeepFreak]

Strange because I fill it to F and that sumbeezy will be slightly above F and only pump about 17.3 gallons. It won't fill anymore cause the vapors shut the thing off.

[ArmyGuy45]

22.1 but that is a 90/10 ratio of highway to city. No mods since the last time I posted.

[XJMikey]

Strange because I fill it to F and that sumbeezy will be slightly above F and only pump about 17.3 gallons. It won't fill anymore cause the vapors shut the thing off.

According to my local jeep dealer;l, that's normal. He told me his (4) XJ's are the same way. He believes it's like that, to act as a reserve, should you not find a gas station before hitting "E".

====

I installed Ford 4 port injectors, and gained a 2mpg increase over my last 2 tanks. Though I'm sure that will decrease with time, since I love the new throttle and smoother accelerattion, feeling.

[ArmyGuy45]

According to my local jeep dealer;l, that's normal. He told me his (4) XJ's are the same way. He believes it's like that, to act as a reserve, should you not find a gas station before hitting "E".

====

I installed Ford 4 port injectors, and gained a 2mpg increase over my last 2 tanks. Though I'm sure that will decrease with time, since I love the new throttle and smoother acceleration, feeling.

I think its 20 gallons capacity but you have to have room for expansion. That is why you can only fit ~17 gallons.

[drakan1908]

My Grand holds 22 gallons...I had to put 21 gallons in it last week. First time I ever saw the gas light on

Sent from my XT907 using Tapatalk

[JeepFreak]

So it is 20 but since gas and its vapors expand I'm only able to put in 17? Man what a load lol thanks Chrysler.

[HeartTheft]

14/17... And going down. XD

[ArmyGuy45]

So it is 20 but since gas and its vapors expand I'm only able to put in 17? Man what a load lol thanks Chrysler.

It also depends on the where the input pipe is attached to the tank. The tank could be 20 gallons but if the intake tube is lower than the top level of the tank then it will never fill all the way up.

PS. I am at 164 miles and only at 3/4 of a tank. Is my gauge broken? It seem to be moving WAY to slowly......

[Brasscatz]

Can't knock me for having a civic daily driver...

Sent from my Samsung Galaxy S4 because my microwave couldn't do it

[Spike3]

It also depends on the where the input pipe is attached to the tank. The tank could be 20 gallons but if the intake tube is lower than the top level of the tank then it will never fill all the way up.

PS. I am at 164 miles and only at 3/4 of a tank. Is my gauge broken? It seem to be moving WAY to slowly......

Either your gauge is off or you've broken physics :-P If you're actually getting those numbers I want to replicate your build.
Try using a GPS to track your actual miles and compare that with how many gallons you fill up with.

[Carves]

Bargain day at the servo today.

Only $100 for 3/4 of a tank .. :rolleyes:



Good reason to only have a 2" lift and little 30" tyres .. :D:D

[XJ Wheeler]

Can't knock me for having a civic daily driver...

Sent from my Samsung Galaxy S4 because my microwave couldn't do it

Showoff! :rolleyes:


:p

Sent via messenger pigeon - i talk, he types.

[ArmyGuy45]

Either your gauge is off or you've broken physics :-P If you're actually getting those numbers I want to replicate your build.
Try using a GPS to track your actual miles and compare that with how many gallons you fill up with.

Its pretty much stock so I hope it really isn't that far off!

I am at 275 and just below half tank.....

[rabies]

i had 16.2 when i got it. seafoamed and fresh gas. 154k miles on it.
with upgraded injectors 16.8 avg (and thats hauling stuff moving to new house)
no lift. 29" tires(bald)
4.10gears? chr 8.25 rear axle

[ArmyGuy45]

354 and I have a little less than 1/4 of a tank left. It falls faster near the end so I only see me getting about 375 with this tank. That should put me around 21.4 mpg.... we will see..

[slvmart]

On one of my trips to Houston, when my son was going to school at SAM, I got 21 mpg. That was in the old days when it was stock. I'm averaging around 16 mpg, now with about a 3.5" lift and 31's. About the same as my F350 diesel, crew cab with a 8' bed, when not towing.

[ArmyGuy45]

So the computer LIES!!!

I got 356.5 miles on 17.28 gal = 20.6 mpg. Not to shabby but I would of loved to be in the 22 range.

[ArmyGuy45]

20.7 on the last tank.

[rabies]

avrgn 17.1 now. newer tires n removed front driveshaft

[ArmyGuy45]

19.1 on the last fill up. 109 average outside and the AC is killing my gas.

[Ornery]

Just got back from a trip from Texas to Missouri. Still averaging around 26.6 mpg on the highway. Bone stock, 5 speed. I was very conscious of my shifting, stopping, and starting.

[ArmyGuy45]

Just got back from a trip from Texas to Missouri. Still averaging around 26.6 mpg on the highway. Bone stock, 5 speed. I was very conscious of my shifting, stopping, and starting.

I wish I could do that. Why doesn't the Wrangler 5/6spd swap into our XJ's?

[rabies]

got 31s now I steel wheels.. 13ish :(

[KMW-NWXJ]

Only had ours since June and only 9 fill ups so far. We live in a very rural area 6 miles from town. Most driving is this 6 miles to and from town and in town. Only a couple longer freeway stretches so far.

91 with 2" lift and 31" MT tires, 5 speed transmission. 4.0. Jeep has 214K on it, but the motor is fresh.

I use the android app FuelLog and track every fill up. It will give you costs, graphs, and is pretty cool.

Best, 16.67
Worst, 12.4
Avg, 15.24

[WhiteDevil1311]

I have that app as well.

Best to worst
26.72
17.25 avg
13.55

1994 4.0 173k

[abebehrmann]

Averaged 17.1mpg last fill up. Mixed city/highway driving. 1999 4.0L, AW4, 2.5'' lift with 31x12.50x15 BFG all terrains.

[graverobberjk]

20.9 on 3" lift and 35s

[ArmyGuy45]

20.9 on 3" lift and 35s

What specs and driving habits gave you that?

[KMW-NWXJ]

What specs and driving habits gave you that?
I'd like to know that as well!

[graverobberjk]

What specs and driving habits gave you that?

I run the 3.6 Pentastar engine (2013 JKU) with 3.73 gears, AFe Stage 2 cold air intake, magnaflow/ Magnapack cat back exhaust and superchip flashpak set at 87 octain. highway driving at about 70-75 mph I average anywhere from 19.9 to 20.9 depending. city I average around 16.5-17 because my exhaust sounds mean as hell and I love hearing my baby roar :D lol.

[ArmyGuy45]

I run the 3.6 Pentastar engine (2013 JKU) with 3.73 gears, AFe Stage 2 cold air intake, magnaflow/ Magnapack cat back exhaust and superchip flashpak set at 87 octain. highway driving at about 70-75 mph I average anywhere from 19.9 to 20.9 depending. city I average around 16.5-17 because my exhaust sounds mean as hell and I love hearing my baby roar :D lol.

Oh, its a JK.....:lame:

:smiley-scared003:

I had a 08 Rubicon and was able to get 23 mpg out of it.

[EekGirl96]

I have a lead foot so my mpg's arent that good....and honestly the libby mpg isnt much better than an xj...I think it gets like 16 city and 22 highway...it sucks

[graverobberjk]

Oh, its a JK.....:lame:

:smiley-scared003:

I had a 08 Rubicon and was able to get 23 mpg out of it.

My '11 sahara would get about that much, but like I said I like the sound of this exhaust so im sure that has something to do with it lol.

[ArmyGuy45]

20.6 on my last fill up!!!! Eat it JK!:D

[drakan1908]

11.2 mpg city -4" lift on 31" mud tires with 355 gears.

[graverobberjk]

20.6 on my last fill up!!!! Eat it JK!:D

showing 22.3 on my dash this morning....EAT IT XJ!! lol

[Brasscatz]

showing 22.3 on my dash this morning....EAT IT XJ!! lol

Ahem :poke: lol

Sent from my Samsung Galaxy S4 because my microwave couldn't do it

[abebehrmann]

Ahem :poke: lol

Sent from my Samsung Galaxy S4 because my microwave couldn't do it

I had a Honda for a while... Then I found my misplaced testicles and bought my Jeep for a DD... :poke:

[graverobberjk]

Ahem :poke: lol

Sent from my Samsung Galaxy S4 because my microwave couldn't do it

didnt know you owned a prius!?!?

[gary63]

I will agree that Honda get better mpg but then they need to with no ground clearens they have to drive around everything and take the long way around.

[graverobberjk]

if your worried about MPG and own a jeep you got the wrong vehicle...its not about miles per gallon, but smiles per gallon :D

[Brasscatz]

lol, shit.... the gas savings from the civic pays for the civic! leaves my Jeep for fun.... when I get to take it out anyways lol.

[gary63]

also the money you save on gas you can buy more toy for the jeep right?

[Brasscatz]

lol, sorta. I get a "Jeep Fund" and sometimes it takes time to save up to get stuff I really want.

[graverobberjk]

same thing I do, or just wait until tax time and use some of my refund. I know that I got a lot I want to do this year. mostly for improved performance on the trails. right now mine is great, but can always improve :)

[gary63]

I have found if you buy some tool the you can use and ether help out some one or loan or rent it out it helps to pay for more and you and others get things done. I'm working on getting a bender and then with it I will trade to get things done around the house.

[Rocco83]

30.5 I'm going to go out on a limb and say whoever filled it up last didn't reset the trip. I did manage 4 weeks of work and back on only a half tank so I won't complain.

[Rocco83]

I have found if you buy some tool the you can use and ether help out some one or loan or rent it out it helps to pay for more and you and others get things done. I'm working on getting a bender and then with it I will trade to get things done around the house.


You are lucky you know people you can lend tools to and get them back. For the money I have invested in buying replacement tools for the ones I leant out to friends and family and never got back I could have afforded to fully build my Jeep by now.

[Carves]

21.5mpg all day, today ... according to the U.S. display in the roof console.

Seems I really got to fit a 195* t'stat,

... running at a constant 190*-194* coolant temp,

... is killing my fuel economy .. :rolleyes: .. :smiley-laughing021:

[XJ Wheeler]

Well, I can make all of you guys feel like rockstars. My last figure showed just under 8.5 mpg. That is city but still.

[OldFaurt]

My DANA 35 has Grenaded spider gears, So I am running front wheel drive only for the last 10,000 miles at 19 MPG, but it leaks a little ATF from the transfer case... I am thinking it needs seals, but I have a Chrysler 8,25 with 3.07 gears need to find some 3.55 gears. i should be getting 6 MPG in no time!

[ArmyGuy45]

16.4 mpg. I wonder if this was a bad batch of gas? I normally drive about a 90/10 free/city combination and I will admit that this changed on this tank to about 70/30. Would that make that much of a difference for 4 mpg change?

[rabies]

was getting a lousy 13.7 after 31s. then found and fixed a vacuum leak and airing up tire smore i get 14.3 now.
my alignment is way off and i have severe death wobble. i bet after fixing that il show more mpg but that means 3.5" lift will be on and it will be lower :/

[rabies]

My DANA 35 has Grenaded spider gears, So I am running front wheel drive only for the last 10,000 miles at 19 MPG, but it leaks a little ATF from the transfer case... I am thinking it needs seals, but I have a Chrysler 8,25 with 3.07 gears need to find some 3.55 gears. i should be getting 6 MPG in no time!

so ur driving around in 4wd? high most likely.
will that wear out your transfer case? i think ima do this lol

[XJ_Lou]

I average about 13-14 mpg

35's w/ 4.88's