JT owners post your MPG

[j.o.y.ride]

Less than a lot
More than a little

Sponsored

 

[j.o.y.ride]

Speedo verified by Garmin GPS. First 26 miles of this tank I was at 25.3 with average speed of 60 mph.

60?!

 

[Junior88]

I was getting 18.5-19.4 mostly highway or country back road driving in my overland auto.

This last tank of gas I’ve had the top totally off and been without the front doors and have dropped down to low 15s with no change in driving behavior.

 

[Black1Star7]

If you experience knock or a stutter in the rev range, go higher.

 

[Jt-wrx]

Lmfao...

well if someone wants to post a 25/26 at least post your hypermiling driving tactics haha, now we all know for sure

 

[Empty Pockets]

I posted early in this thread. Low ‘20’s don’t remember the number exactly. Caught some flack from another member that I took the reading early on in a tank full. Can’t imagine what difference that would make, but OK. Here is my trip OD showing 22.5 mpg over a 4100 mile range. All back n forth to work, running to the store, hauling normal home-owner crap, etc. I’m very happy! 6speed and a light foot.

 

[Jeeperjamie]

Best I ever got was 22 on a trip to Virginia on 315 70 17 BFG KO2 tires. Can't really speak about stock tires because I only had them on my Jeep for a day. Average as I type is 18.4 on the computer, speedo is pretty much dialed in based on Garmin GPS, Google GPS and a couple apps I downloaded online and based on my buddy who's a cops radar gun. It fluctuates between around 18.2-19 depending on if I stop in a drive through or if my wife drives because she likes to sit around with the JT running with the air on. I've noticed that sitting idle really brings the MPGs down fast. Anyone posting 25/26 something has got to be off with the computer, I don't see it. My BMW 440i gets gas mileage like that and I know it's way more fuel efficient than the gladiator.

 

[ShadowsPapa]

I have over 150,000 kms on pentastar since 2014 now, and my ram 8-spd was incredible on gas for a 5300 lb good aero and stick height and stock skinny 31’s.

There was one time I saw a fuel mileage rating about 25 mpg (9.3 l/100km) and that was where the speed limits for the whole region didn’t exceed 80-90 km/h (55-56 mph) yet was all highway and I was empty. It was possibly the most ideal conditions and discipline driving I’ve ever had in my life.

To tell me Jeep gladiators are pulling down this kind of mpg in normal everyday use when I own one and have the ram that kicks it’s ass before that? Ya...I’m buyin it boys.

So far in 16,000 kms on my gladiator with gps corrected speedo at 80 mph the computer has averaged 2.3% optimistic numbers...I hand calculated every single tank. I am getting exactly what I expect and even better for my 37’s on 4.88’s now but ran 35’s and 37’s for the bulk of it on 3.73,s until recently.

The best a JT will do on the highway, stock, at real 75 mph, hand calculated and corrected will be in the 11 l/100km range, I would suspect with discipline low 11’s at best...21 mpg. I’d wager though closer to 12 l/100km would be more common(19 mpg).

these 25/26 must be running the 245 wide tires stock height at grandpa velocity...there’s no other way a pentastar is gonna beat it’s ratings like that

Really? Mine is in the 55 mph range most of the time. over 60 the JT really falls off- but then so did my Silverado. The JT 3.6 is also tuned a lot different than the others. My wife has a 2018 Grand Cherokee with 3.6 and it's a totally different animal! I mean really different. My JT has more "zip" although her's is no slouch. She was pulling high 26 mpg range over recent days - speeds 45-55 with a couple of runs at 65. Speed limits here are typically 55, 65 on the interstates until you get out of the metro, then it's 70. Our neighborhood is 45, then up to 55 on the 2 lane roads, 65 on the 4 lane highways.
I don't exactly baby my truck - ADHD, I have a need to shove people out of the way so I can get where I'm going. My MPG last time was with the Rubicon tires and wheels still on it.
You can't compare any 3.6 before 2019 to these - tuned very differently. And sounds like you are calling us liars.
Mine has been consistent since day 1 - 19+. If I stay out of it, don't bust the speed limits, I'll do 20-21. Most recently the trips have been a 55-60 speed limit (I235 through Des Moines).
And I'm including a small bit of in-town driving in that, too.
Ask my wife how many speeding tickets I used to get.......... 4 years ago I had 3 in a year. Ask her how many times she's on me about taking off too fast, abrupt moves, getting impatient with other drivers (oh, if they could only hear me - good thing they can't)

Seems like you are calling a few of us liars.
But then you drive a Sport S with the LOWER gear ratio, and a 6 speed so likely you are not able to reach those numbers. that explains a lot of your inability to get those numbers.
I like the manual transmissions, too. My SX4 is a 5 speed stick, but a modern automatic in that would actually get better mileage than I do shifting it. I bet if I had the Jeep automatic in my Eagle, I'd get better than the 25 mpg I get with that car, too.

You saw the picture. I don't lie, I have no reason to. This is not a contest, I win nothing, I don't get a trophy (where would I put it anyway), no cash prize. I just report facts. Mama would be PO'd at me if I told lies. (she's always watching now since 2015)
21 is very typical for my Truck if I do more in-town and interstate driving at 65+.
I can do better with the 55 mph limits - but then that's SCIENCE!
It's proven that speeds over 60 trash mpg - it's a fact. Wind resistance increases exponentially over about 60 - and the JT is a BRICK.
If the dealer ever was able to check the history on my truck, they'd see that it's pushed 85+ a few times when I get ticked with slow traffic. So no, I don't grandpa drive. Not with my severe ADHD. I can't even stand to ride with others - I want to hit the gas for them.

 

[Jt-wrx]

edit...meant for empty pockets, ya, you gotta do it tank to tank, the computer has pretty rose colored glasses on the bulk count, makes it look wonderful, my last two tanks were about 5% optimistic over real, i've actually monitored what the computer says to what is hand calculated, i have been running all my mileage in a spread sheet that works it all out including the difference in percentage, not once has it read better than actual lol, the average over thousands and thousands of miles is coming up at 2.3% better reading than actual should anyone be curious, not sure why i'm so data/table oriented but i guess i really like excel and accurate data lol

 

[Jeeperjamie]

Really? Mine is in the 55 mph range most of the time. over 60 the JT really falls off- but then so did my Silverado. The JT 3.6 is also tuned a lot different than the others. My wife has a 2018 Grand Cherokee with 3.6 and it's a totally different animal! I mean really different. My JT has more "zip" although her's is no slouch. She was pulling high 26 mpg range over recent days - speeds 45-55 with a couple of runs at 65. Speed limits here are typically 55, 65 on the interstates until you get out of the metro, then it's 70. Our neighborhood is 45, then up to 55 on the 2 lane roads, 65 on the 4 lane highways.
I don't exactly baby my truck - ADHD, I have a need to shove people out of the way so I can get where I'm going. My MPG last time was with the Rubicon tires and wheels still on it.
You can't compare any 3.6 before 2019 to these - tuned very differently. And sounds like you are calling us liars.
Mine has been consistent since day 1 - 19+. If I stay out of it, don't bust the speed limits, I'll do 20-21. Most recently the trips have been a 55-60 speed limit (I235 through Des Moines).
And I'm including a small bit of in-town driving in that, too.
Ask my wife how many speeding tickets I used to get.......... 4 years ago I had 3 in a year. Ask her how many times she's on me about taking off too fast, abrupt moves, getting impatient with other drivers (oh, if they could only hear me - good thing they can't)

Seems like you are calling a few of us liars.
But then you drive a Sport S with the LOWER gear ratio, and a 6 speed so likely you are not able to reach those numbers. that explains a lot of your inability to get those numbers.
I like the manual transmissions, too. My SX4 is a 5 speed stick, but a modern automatic in that would actually get better mileage than I do shifting it. I bet if I had the Jeep automatic in my Eagle, I'd get better than the 25 mpg I get with that car, too.

You saw the picture. I don't lie, I have no reason to. This is not a contest, I win nothing, I don't get a trophy (where would I put it anyway), no cash prize. I just report facts. Mama would be PO'd at me if I told lies. (she's always watching now since 2015)
21 is very typical for my Truck if I do more in-town and interstate driving at 65+.
I can do better with the 55 mph limits - but then that's SCIENCE!
It's proven that speeds over 60 trash mpg - it's a fact. Wind resistance increases exponentially over about 60 - and the JT is a BRICK.
If the dealer ever was able to check the history on my truck, they'd see that it's pushed 85+ a few times when I get ticked with slow traffic. So no, I don't grandpa drive. Not with my severe ADHD. I can't even stand to ride with others - I want to hit the gas for them.

I think he's saying the above 23 MPGs guys are lying not you. I can see those MPGs being achieved on yours with stock tires and wheels, 100% doable.

 

[ShadowsPapa]

Best I ever got was 22 on a trip to Virginia on 315 70 17 BFG KO2 tires. Can't really speak about stock tires because I only had them on my Jeep for a day. Average as I type is 18.4 on the computer, speedo is pretty much dialed in based on Garmin GPS, Google GPS and a couple apps I downloaded online and based on my buddy who's a cops radar gun. It fluctuates between around 18.2-19 depending on if I stop in a drive through or if my wife drives because she likes to sit around with the JT running with the air on. I've noticed that sitting idle really brings the MPGs down fast. Anyone posting 25/26 something has got to be off with the computer, I don't see it. My BMW 440i gets gas mileage like that and I know it's way more fuel efficient than the gladiator.

My wife gets 25+ typical, average, she's gotten 26-27 lately (speed limits in those trips was 55-60) - Grand Cherokee with 3.6 They are very efficient engines and the latest tuning Jeep has done makes them even better. She's got a 2018 now. She had a prior GC and it got a whopping 18 - SAME engine. Each time she has traded, we've seen the MPG go up on the GC 3.6 so it would figure the 2020 would do even better.
Of course, speed is everything in MPG - and I don't mean grandpa or grandma driving, I mean the maximum speed, as in speed limit if you will. Anything over 60 will kill MPG on any vehicle - the science of wind resistance. That's why the USA set the limit to 55 years ago. SCIENCE, not congress, determined the average maximum speed at which MPG drops down the toilet. OVer 60 and it tanks due to the exponential increase in wind resistance above about 60.
So if you drive 60 or under you will get far far better mpg.
70 or over, don't bitch about MPG

 

[Jt-wrx]

and shadowspapa...i believe you now, your numbers match what i've done once with this motor/8-spd in those conditions you drive, i take it on stock wheels also, that's super unrealistic in my part of the world to go that slow or have most of it be non stop and go, it is a really efficient motor and i'm a big fan, i just don't know anyone or situations/places where that could be remotely normal

i'm on 37x12.50's with 4.88's and getting 16.6 mpg over last 3 tanks and lots of that city and having fun since it really pulls like a little tank now, 6-spd manual with exhaust, so it's almost sports car fun to drive as you can hear it and choose shift points on noise etc., it's hard to behave, i've seen it show on the highway legs about 12.9 l/100km so far which is 18.2 mpg, so mine is happier with this gearing over the 3.73 and is getting better mileage, after a couple thousand more miles i feel the average will be a little lower than 16.6 mpg likely settle somewhere between there and 16

very few people are going to see mileage like you, just don't want people getting any ideas about how theirs sucks compared to yours lol

 

[ShadowsPapa]

ya, you gotta do it tank to tank, the computer has pretty rose colored glasses on the bulk count, makes it look wonderful, my last two tanks were about 5% optimistic over real, i've actually monitored what the computer says to what is hand calculated, i have been running all my mileage in a spread sheet that works it all out including the difference in percentage, not once has it read better than actual lol, the average over thousands and thousands of miles is coming up at 2.3% better reading than actual should anyone be curious, not sure why i'm so data/table oriented but i guess i really like excel and accurate data lol

I keep a spreadsheet. LibreOffice Calc.

I started doing that when I built my SX4 - people were griping about their Eagles getting 14-18 and I said I did over 20 - and they didn't believe it. I also tracked the sort of driving on that tank (long trips, mostly town, etc.)

Funny thing about the computer in my Silverado- when it said I had used 20 gallons, I could get exactly 20 gallons in the truck, give or take a tenth now and then. (and that will vary with how the truck is sitting at the time, temperatures, etc. as gasoline expands and contracts greatly with temp changes, far more than many other liquids.)

 

[Jeeperjamie]

My wife gets 25+ typical, average, she's gotten 26-27 lately (speed limits in those trips was 55-60) - Grand Cherokee with 3.6 They are very efficient engines and the latest tuning Jeep has done makes them even better. She's got a 2018 now. She had a prior GC and it got a whopping 18 - SAME engine. Each time she has traded, we've seen the MPG go up on the GC 3.6 so it would figure the 2020 would do even better.
Of course, speed is everything in MPG - and I don't mean grandpa or grandma driving, I mean the maximum speed, as in speed limit if you will. Anything over 60 will kill MPG on any vehicle - the science of wind resistance. That's why the USA set the limit to 55 years ago. SCIENCE, not congress, determined the average maximum speed at which MPG drops down the toilet. OVer 60 and it tanks due to the exponential increase in wind resistance above about 60.
So if you drive 60 or under you will get far far better mpg.
70 or over, don't bitch about MPG

That's a Grand Cherokee not a Jeep Gladiator. We used to get around 24-25 in our 2010 Grand Cherokee, can't compare that to a Jeep Gladiator. I can get the best gas mileage out of mine at the 70-79 mph range if it's not stop and go, that seems like the sweet spot for the JT to stay in 8th gear the longest for me on 35's. That was my experience on my trip to Virginia, 2hrs and averaged right at 22

 

[ShadowsPapa]

I think he's saying the above 23 MPGs guys are lying not you. I can see those MPGs being achieved on yours with stock tires and wheels, 100% doable.

They were the stock Rubicon tires and wheels the last pic I posted.
I was SHOCKED. I expected LOWER MPG on the Rubicon tires than with the original stock Overland tires.
I figured putting the wider Rubicon tires on would lower things at least .5 mpg. They didn't.
But then I don't run as low a pressure as some do, either.
I run 36 in the Overland tires, 36-38 in the Rubicon tires (got lazy and decided to not adjust them as our temperatures swing so wildly)

Overland, not lifted, has a better configuration for MPG - HIGHER gear ratio.
I can see the Sport S and Rubicon guys complaining - you lift it, your mpg will likely drop. Put on 100 pound tire/wheel assemblies, again, you made it heavier, mpg will drop. Heavy winch and bumper - there ya go, mpg will drop.
So anyone who is running a NON-STOCK JT can't really say anything about MPG.
Any time you let more air under the vehicle or expose the front tires to wind - mpg drops. Cut off those bumper/fender fillers, you may lose up to about .2 mpg

My other thing is that you can't compare a 3.6 from 2016, 2018, whatever, to a 3.6 from 2020.
Doesn't matter how many 3.6's you've owned or driven, if they were older than 2018, they were totally different engines in some ways.
We've experienced that ourselves because my wife trades Jeeps every 2 to 2.5 years. The last three trades each one did better mpg-wise. SAME exact setup, same engine, same trim level, and yet each time we traded, she could drive further and further on a gallon of gas. It got to the point she could make it all the way to Branson, MO from home on the same tank, her trip costs kept dropping (well, not if you could the cost of the Jeep HA! But then when you trade in a 2.5 year old vehicle with only 15,000 miles on it - you get good trade-in dollars)

Sponsored