Milage not what I expected

[White Eagle]

I do think the speed makes the most diff

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[NC_Overland]

Yeah that has nothing to do with it

Was that sarcasm? I get terrible MPG around town because of how I drive. I do good on the hwy unless I go 80+ and then it plummets. 4-5 mpg down.

 

[Janster]

I’m sure there are a gazillion different factors…… Grand Cherokee probably weighs less (unibody) than the JT (frame). Doesn’t the GC have IFS now versus solid axles? Car tires…. Aerodynamically better…. Etc. Yadda yadda yadda

I have a 2024 Mojave X….. auto… with 12,000 miles. I’m regularly seeing 15-16mpg this winter / winter gas / w/ remote starts, etc.

In the summer, its worse (13-15mpg) because I’m hauling a 3,500lb boat around on the weekends. We’ve taken a couple trips without the boat…and were lucky to see 18mpg.

 

[brsnow2585]

You will see wildly varying mpg claims from people on the internet with pretty much every vehicle type out there, but especially with trucks. Far too many variables to have any type of consistency.

Need to take into consideration if you remote start your truck or let it idle often, that makes a significant impact on mpgs. My diesel sees 20-ish indicated average per tank in the summer, and I will see 20ish indicated while cruising at 65mph on summer fuel. Swap to winter blend and now I see 15ish indicated average per tank, but I see 18ish indicated at 65mph. So I am losing about 3mpg average overall because of remote start idling.

My '22 JTRD does about the same. Usually hangs around 22 mpg for my normal driving, drops to about 19 mpg if I'm pulling my camper. I will say it's really consistent though, unless I get a skunky tank of fuel, gets grumpy. I have the ASS "feature" disabled, I'm sure that would make some kind of difference one way or the other. I'd test it but I don't think I can survive a whole tank with the herky jerky at every stop sign/light.

 

[Nwjeepguy]

Was that sarcasm? I get terrible MPG around town because of how I drive. I do good on the hwy unless I go 80+ and then it plummets. 4-5 mpg down.

It was sorry if it came off wrong, appreciate you our input

 

[Nwjeepguy]

It was sorry if it came off wrong, appreciate you our input

I drive pretty conservatively but even say 160 mi to e trip at 70mph I haven't got any better then high 15 maybe 16 tops

 

[dirty red label]

I get 75 miles to the gallon went I go down a hill!

 

[MPMB]

I recently traded a 22 grand Cherokee overland with a v6 penstar engine and replaced it with a 24 gladiator with the same motor. My question is this I was consistently getting between 18 and 20 mpg in the Cherokee but the new jeep seems to be much lower, 14 to 16. The rug has 10,000 on it now.should I be getting better mpg then that? For clarification it's a Rubicon on 33's with 4:10s and automatic

What part of WA? I would assume the west side. I used to live there.

Everything there is against getting optimum MPGs.

1. Heavy, wet air on the west side sucks for a brick on wheels
2. Hilly terrain
3. Stop & go traffic
4. Bad ethanol gas blends

I would average 15-15.5 for the most part. Outfitted at the time in similar fashion - winch, bed rack, 33" tires. My JTR isn't a commuter, I'm WFH for now. Still has almost 70k miles on it <grumble>.

Driving in Montana or Wyoming I'd get 17-18mpg without even trying. Road trips I get to see my mpgs go up rapidly.

Staying around 65mph will give you the most MPG at the fastest speed for stock configurations (I think, going off my experience). Going faster will just suck the gas. We did a road trip NYD to Great Basin and I stuck around 65mph and had the best MPGs ever on 37s & 4.10s.

 

[NC_Overland]

I’m sure there are a gazillion different factors…… Grand Cherokee probably weighs less (unibody) than the JT (frame). Doesn’t the GC have IFS now versus solid axles? Car tires…. Aerodynamically better…. Etc. Yadda yadda yadda

I have a 2024 Mojave X….. auto… with 12,000 miles. I’m regularly seeing 15-16mpg this winter / winter gas / w/ remote starts, etc.

In the summer, its worse (13-15mpg) because I’m hauling a 3,500lb boat around on the weekends. We’ve taken a couple trips without the boat…and were lucky to see 18mpg.

They actually weigh about the same. They’re based off of a super heavy seven generations ago Mercedes ML platform. They do have smaller tires, are lower to the ground, and have better aerodynamics.

 

[MrBones]

Your numbers don't surprise me. '23 JTM with stock 33's, 4.10's and stock everything else. I have the plastic bumper. City driving with one or two 30 mile round trips per week on freeway 65-70 MPH. I'm getting 14-15 but I never use Start/Stop. The surface streets in my neighborhood are flat. I can get 8th gear at 50 MPH on them when the stop lights are far enough apart. Before the JTM I had a '16 JKUR (I know, different 3.6 motor). Fifty mile round trip freeway commute five days a week and I barely got 15.

 

[wchevron]

I've got a 22 Rubicon on 35's. Summer I average 16.5-17. Winter right around 15. This has been consistent since I bought it. Even the first year with the factory 33's, I was maybe only get .5 mi/gallon better. Think the best I ever saw was 18.5 avg on a 500 mile highway drive.

Funny enough, I have a 1977 FJ40 Landcruiser. That averages 11 mpg and talk about a brick. Pretty disappointing the Gladiator only gets a 5-6mpg gain in 49 years of development

 

[NC_Overland]

I've got a 22 Rubicon on 35's. Summer I average 16.5-17. Winter right around 15. This has been consistent since I bought it. Even the first year with the factory 33's, I was maybe only get .5 mi/gallon better. Think the best I ever saw was 18.5 avg on a 500 mile highway drive.

Funny enough, I have a 1977 FJ40 Landcruiser. That averages 11 mpg and talk about a brick. Pretty disappointing the Gladiator only gets a 5-6mpg gain in 49 years of development

Man, 5-6 mpg is a huge improvement. You also gained 100 hp, larger tires, and more ground clearance.

I always thought that it’s impressive that my 2020 Gladiator gets within a few MPG hwy of my 2018 Colorado that also has a 3.6l/8 speed when it’s 1k lbs heavier, has much larger and heavier tires, worse aerodynamics, and is a lot higher off the ground. City is about the same. That’s win if you ask me.

 

[Nwjeepguy]

What part of WA? I would assume the west side. I used to live there.

Everything there is against getting optimum MPGs.

1. Heavy, wet air on the west side sucks for a brick on wheels
2. Hilly terrain
3. Stop & go traffic
4. Bad ethanol gas blends

I would average 15-15.5 for the most part. Outfitted at the time in similar fashion - winch, bed rack, 33" tires. My JTR isn't a commuter, I'm WFH for now. Still has almost 70k miles on it <grumble>.

Driving in Montana or Wyoming I'd get 17-18mpg without even trying. Road trips I get to see my mpgs go up rapidly.

Staying around 65mph will give you the most MPG at the fastest speed for stock configurations (I think, going off my experience). Going faster will just suck the gas. We did a road trip NYD to Great Basin and I stuck around 65mph and had the best MPGs ever on 37s & 4.10s.

Actually I'm on the east side. I'm curious how your rig does running 27s with 4:10s. I was going to just go to 36s due to having 4:10

 

[DirkG]

I live in the hills in the OC and my JT is thirstier than Cousin Eddie on Christmas Eve. I average 13mpg in my '24. We average about 20mpg in our JL 4xe. We're looking at trading in our Acura MDX for a 2026 Grand Cherokee here in the coming months, so I'm expecting the mpg to fall between the JT and JL 4xe.

 

[MPMB]

Actually I'm on the east side. I'm curious how your rig does running 27s with 4:10s. I was going to just go to 36s due to having 4:10

Fine on 37s. It's not going to win any drag races, but no Jeep will. It's been driven from UT to IN and back (short and long way), to CA and back without any issues. My issue was the lovely intake camshaft issue.

But spend the coin and get good 37s. I have Patagonia A/Ts that are horrible after 20k miles. Weak sidewalls, cupping, etc.

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