Does Jeep purposely design their vehicles to get 19 mpg?

[MyMojave]

I have owned five different Jeeps so far in my life.
1) 1985 CJ 7 with a 4.2l inline 6 cylinder, 3 speed automatic, 2“ shackle lift and 32” tires
2) 1995 YJ with a 2.5l 4 cylinder, 5 speed manual, stock suspension 32” tires
3) 1999 XJ 4x4 with a 4.0l inline 6 cylinder, 3 speed with OD, stock suspension and 32” tires
4) 1998 TJ with a 4.0l inline 6 cylinder, 5 speed manual, 4” lift and 33” tires
5) 2021 JT Mojave with a 3.6 V6, 8 speed automatic, stock suspension and 33” tires

I was driving my JT today and looked at my gauge cluster, I noticed I was averaging 19 mpg. Not that this surprised me as I always seem to get high 18‘s to mid 19‘s with the JT.
The thought occurred to me that every Jeep I have owned has gotten right at 19 mpg.

Seems to me the engineers at Jeep have this hard set rule for what kind of fuel mileage their products should be getting.

Just some random thoughts as I was doing windshield time today.

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[Superbike1]

I think it has more to do with the shape. I've had a Cherokee sport 2 door with the 4.0ho inline 6. It got almost the same mileage as my 2021 JT. Similar shape in the front.

 

[Dilly’S Willy]

Que the required Cow VS Jeep airflow diagram, please. Anyone?

 

[saintpauljeff]

I wish I was getting 19 mpg on the 33" tires, whenever I look the long term avg is always showing 17

 

[danimal2000]

Que the required Cow VS Jeep airflow diagram, please. Anyone?

Got you bro

 

[Sot]

I have owned five different Jeeps so far in my life.
1) 1985 CJ 7 with a 4.2l inline 6 cylinder, 3 speed automatic, 2“ shackle lift and 32” tires
2) 1995 YJ with a 2.5l 4 cylinder, 5 speed manual, stock suspension 32” tires
3) 1999 XJ 4x4 with a 4.0l inline 6 cylinder, 3 speed with OD, stock suspension and 32” tires
4) 1998 TJ with a 4.0l inline 6 cylinder, 5 speed manual, 4” lift and 33” tires
5) 2021 JT Mojave with a 3.6 V6, 8 speed automatic, stock suspension and 33” tires

I was driving my JT today and looked at my gauge cluster, I noticed I was averaging 19 mpg. Not that this surprised me as I always seem to get high 18‘s to mid 19‘s with the JT.
The thought occurred to me that every Jeep I have owned has gotten right at 19 mpg.

Seems to me the engineers at Jeep have this hard set rule for what kind of fuel mileage their products should be getting.

Just some random thoughts as I was doing windshield time today.

Jeep dont care about gas mileage. They could do a lot better. I've owned a few myself and the same

 

[Sandman 4x4]

Yea I can agree, from the 6cyl CJ, I bought new in the 70’s, then the YJ in 95, with 4 cyl 5 speed without power steering I could get 21, but at 45 mph. Then the 2015 Cherokee TrailHawk with 30” tires averaged 19-24, depending how much highway at 65 max. Not this Gladiator Sport S, hardtop auto, gets about the same, with lifetime average of 19.6, so it’s almost the same, but with twice the power that the 4 cyl 95.

 

[avere3]

I've got a 2001 TJ soft top with the 2.5L and 5 speed and a 2024 JT hardtop with the 3.6L and 8 speed auto, and I get about 20mpg with both. Lately I've been seeing the Gladiator's average on the display show about 23mpg if I can stay away from stoplights.

 

[Sandman 4x4]

I've got a 2001 TJ soft top with the 2.5L and 5 speed and a 2024 JT hardtop with the 3.6L and 8 speed auto, and I get about 20mpg with both. Lately I've been seeing the Gladiator's average on the display show about 23mpg if I can stay away from stoplights.

Yea it’s the stop and go traffic that brings the mileage down in my Spirt S with stock 245/75-17 HT tires on alloys. If I drive like it’s Miss Daisy in the city in bumper to bumper using ACC, I get about 17-19, depending upon red lights. Highway trips with ACC set at the speed limits of 65-70, I can average around 24-22. Locking the trans in 8th gear.

 

[tj3089]

My old sport would average 17mpg on 33's. My current ecodiesel averages that on 40s and 2.5 inches of lift, in town. It can still get into the 20s on the HWY if I keep it at 70mph.

 

[Janster]

You get 19mpg??? Holy shit…… consider yourself lucky!!!
I’m totally stock on 33’s.

I’m consistently between 15 & 16mpg. Even lower if we’re towing the boat on the weekends. The only time I see remotely close to 17 or higher, is if I take a long trip, highway driving (below 75mph) OR…even better…. This JT and my previously owned Canyon loved 45mph. You could take a short trip going 45mph the whole time, I’d get 20mpg.

About to take a 10-12 hour trip to Charlestown SC tomorrow. We’ll see how this goes….and how much $$ It’ll cost.

 

[Labswine]

Until I went to AT tires, I was averaging 21 MPG (20 in the winter) bopping around and the best ever seen on the highway (calc'd fill to fill) was just under 27 MPG. This is in an Overland when I had the factory Bridgestone 255 Dueler HLs on it.

Now I get around 19 bopping around with the new Hankook Dynapro AT2 tires in the 265 flavor. Same height aspect, just one size wider. Don't know highway yet as I have yet to take that kind of trip.

When I first got my Overland in July of '19, I took a trip from the Philly area to Boston, MA and back and averaged 23.5 MPGs.

 

[wuykats]

While we are on the mpg subject, does anyone know how far back the computer goes to figure out your average mpg on the display? I am guessing it only computes for the last 100 miles or so.

 

[Cattywumpuss]

Got you bro

I swear this group just keeps on giving . . . . also this is the most amazing visual explanation of my JT fuel economy I’ve seen so far.

I finally did some highway driving last weekend and cracked the 300 mile range on a full tank.

 

[White Eagle]

I’m not sure on the shape thing because I’ve owned Range Rovers, Land Rover LR3 & 4’s and they all got 25mpg plus in most cases.

I never went on a trip without a break down and have horrible adventure stories. I went from Jeep to Land Rover because jeeps are good for what they do but on icy or snow paved roads like going to a ski slope they suck ! AWD is king in those condition.

My JT gets 16.6-17.5 mpg most days, I‘d like 19mpg

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