JTR Gas Mileage with Stock MT tires

[glady8or]

When new .... 15 mpg around town. After logging about 3-4k miles it went up to 18ish around town and 20-24 Hwy

Sport S Max Tow / 285 MT

20-24 highway? No way!

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[red/green hawk]

You must really be stomping on the throttle to get 13 mpg. I'm averaging 17 to 18 in town.

 

[PsyRN]

I’m getting around 16 average. If I’m watching it, about 16.5, if I’m “just driving it around”, about 15.

 

[ShadowsPapa]

Verified -
NOT on MT, but on AT. I was doing similar on the Rubicon take-offs and then back to the stock H/T Overland tires did this.....
Mine is pretty consistent this way.
Of course if you push these bricks hard over 70, your mileage will suck - any truck would.
It's called WIND RESISTANCE.

 

[fun2drum]

20-24 highway? No way!

Mine does. Stock wheels and tires, and I'm moderate on the gas pedal. Last week I drove 300 miles across NC and calculated it to be a little under 23mpg. The weird thing though is that my Jeep's computer was showing 24.4 mpg avg after that trip. Something's obviously not right with that.

 

[jeepdan]

6000 miles
Stock Overland here with the factory equipped AT tires. Trifold bed cover added.
I haven't recorded actual gallons purchased and then calculated MPG.

But, the computer is now giving me 22.4-23.5 MPG. Started out at 20-21 MPG when new.

 

[glady8or]

ok, I was getting 16ish mpg. SO last week I went on vacation and fueled up right before I left and reset the trip, then I went to Fuel economy b/c I planned to use cruise control and follow the fuel economy throughout the trip. At that point it dawned on me that I have NEVER reset the fuel economy, so I reset fuel economy as well. I ended up getting 21mpg for the whole trip. After refueling yesterday I am at 19 mpg... Not sure, but I am thinking that I was not getting an accurate fuel economy reading as it was looking over 12K miles instead of the current tank.....

 

[rafaelsmith]

I’m getting around 16 average. If I’m watching it, about 16.5, if I’m “just driving it around”, about 15.

That is pretty much what I get on my JTR with MTs w/8000miles.

Its worse on the highway...if you drive at sufficient speed to keep up with traffic. i.e normal interstate speeds.

Only way I see people getting low 20s is if they really baby it and drive on the highway at 50 or so...which is not very realistic these days.

Not really complaining....best I ever got in my Jk was ~12ish...with a tail wind...going down hill....

 

[Kent5]

Verified -
NOT on MT, but on AT. I was doing similar on the Rubicon take-offs and then back to the stock H/T Overland tires did this.....
Mine is pretty consistent this way.
Of course if you push these bricks hard over 70, your mileage will suck - any truck would.
It's called WIND RESISTANCE.

This. JT and JL's are literal aerodynamic BRICKS, with flat square bodies, big tires (even stockers are relatively big), and high ride heights. Pushing them fast through the wind is a sure way to drop your MPG significantly, even if you are "just keeping up with traffic". Test at 65 vs 75, and you will see a marked drop, MUCH more so than the average sedan. Even mildly aggressive driving can drop MPG's by over 25% on heavy trucks like this. Drive as carefully as if you are on the EPA test cycle, and you will see close to EPA MPG figures.

Combine that with what the "average" person thinks is normal in-town starts/stops and getting away from lights at a decent clip, and you're likely to get 12 MPG, even if you don't think you are "full throttle" a lot.

Canna change the laws of physics!

 

[ShadowsPapa]

This. JT and JL's are literal aerodynamic BRICKS, with flat square bodies, big tires (even stockers are relatively big), and high ride heights. Pushing them fast through the wind is a sure way to drop your MPG significantly, even if you are "just keeping up with traffic". Test at 65 vs 75, and you will see a marked drop, MUCH more so than the average sedan. Even mildly aggressive driving can drop MPG's by over 25% on heavy trucks like this. Drive as carefully as if you are on the EPA test cycle, and you will see close to EPA MPG figures.

Combine that with what the "average" person thinks is normal in-town starts/stops and getting away from lights at a decent clip, and you're likely to get 12 MPG, even if you don't think you are "full throttle" a lot.

Canna change the laws of physics!

I have a hell of a time even convincing Eagle people of this point - and it's been that way for years. People gripe that they can't get over 20 with a 1980s vehicle that sits high enough you don't need a jack to change the oil - the suspension sits out there pretty as you please to catch wind. No kidding before judging at shows I have to lay in front of mine and clean the BUGS off the lower control arms, front cross member and front skid plate while the other cars only bother with the bumper and windshield bugs.
This is why there are ground effects - air dams - and the Grand cherokee has baffles that guide air away from those big front tires (uh, yeah, Jeep folks with the stubby bumpers and tall fat tires)
I can get upper 20s with my SX4 but not if I exceed much over 60-65. It drops to about 20 if I do.
But 45-55 and I'm hitting over 25 with that car. Next Eagle forum post is "you guy are lying, I can't get over 16 with mine" and I ask how was their last trip - "oh, interstate, a steady 75-80. Fools, geesh. When you have all that air going under to tangle with the suspension and chassis.. why does Ford put all sorts of covers and baffles under the bottom of the car to make it flat and smooth under there? Go look under a Fusion and see how smooth they are under there, and the car sits low and the fenders cover the fronts of the tires.

 

[stingrey]

My wife and I just did a 3000km (1860mi), round trip, around Lake Superior to Thunder Bay in Northern Ontario.
We had the bed full of camping gear +60lbs of sweet corn for inlaws
The northern 2/3 of this drive is very hilly Trans-Canada HWY.
I kept the speedometer at 110kph (68mph) as often as possible. We averaged 12.4L/100km (18.9mpg US)

 

[BAT]

Verified -
NOT on MT, but on AT. I was doing similar on the Rubicon take-offs and then back to the stock H/T Overland tires did this.....
Mine is pretty consistent this way.
Of course if you push these bricks hard over 70, your mileage will suck - any truck would.
It's called WIND RESISTANCE.

Yep same I was getting around 19-21 + on the stock tires but moving to the Rubi Take offs and so far average city driving is around 15-16 MPG so far.

 

[rafaelsmith]

My one way commute to work is ~13miles. Barring any accidents, etc about 10 miles of that is at most two short lights or stops @35-50mph. The last 3 miles is the killer constant stop and go...at least 5 lights, maybe 20mph, yada yada.

Reset my trip and one week of going to and from work im at ~17mpg. Being careful with how I drive....i put instant MPG on my dash and do what I can with throttle and manual shift to keep it as high as I can.

Funny thing is , one would think ESS would help...but it doesn't...at least not that I have seen. If anything its worse....cause it constantly on/off/on/off/on/off during that last 3 miles.

 

[MrZappo]

ESS is a farce. About as useful as a screen door on a submarine.

It will never save you a penny. And when you have to pay for double the batteries and/or other trouble it causes you will likely be negative.

 

[ShadowsPapa]

ESS is a farce. About as useful as a screen door on a submarine.

It will never save you a penny. And when you have to pay for double the batteries and/or other trouble it causes you will likely be negative.

You totally miss the point of it.
When your city or municipality mandates no idling - you'll see one reason for it. I guess you missed my posts containing only one of many many dozens of such laws I found in a PDF file. Mostly buses and diesel vehicles now, but a couple of cities include GAS POWERED CARS now, too.

You also don't live in California...........

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