Milage not what I expected

[Bandit’s Lair]

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

Yep!!! But it’s that 2900’ elevation climb back up to the house that kills me!!!

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[NC_Overland]

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.

Oof. Acura MDX to a new grand Cherokee? I’d do some research before that purchase. The new WLs are riddled with issues and it seems to be getting worse, not better.

 

[Nwjeepguy]

Oof. Acura MDX to a new grand Cherokee? I’d do some research before that purchase. The new WLs are riddled with issues and it seems to be getting worse, not better.

I will back you on that statement. The WL Cherokee was a problem child since day one and with only 22k on it id had enough and it was down the road motors for that one

 

[KIWelder]

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

My 2024 Gladiator Sport S consistently gets 22-25 MPG. I live rural, so my driving is almost 100% highway and I'm completely stock, which I don't plan to change anytime soon.

 

[DirkG]

Oof. Acura MDX to a new grand Cherokee? I’d do some research before that purchase. The new WLs are riddled with issues and it seems to be getting worse, not better.

I will back you on that statement. The WL Cherokee was a problem child since day one and with only 22k on it id had enough and it was down the road motors for that one

To be candid, I'm a car guy and I've been intentionally expressing that "trade" to gauge online responses. Even from Jeep people, it's not been favorable for the GC. We've owned 5 MDXes and for the most part they've been bulletproof. My wife is looking to mix it up, but the reactions have me a little gun shy.

 

[camss69]

Is not using start stop really that big of difference? I know in theory it is, but shortly after buying my JT I installed the eliminator and never use the SS. Almost every time I drive mine I have about a 1,100 climb to get home. Something else to take into consideration as far as the winter driving is that colder air is denser and does have an impact. I have some experience racing planes and just 10 degrees makes a very noticeable difference in speed, the colder air the slower and being the brick that the JT is I suspect that may have a bigger impact than winter fuel blends.

 

[MPMB]

Is not using start stop really that big of difference? I know in theory it is, but shortly after buying my JT I installed the eliminator and never use the SS. Almost every time I drive mine I have about a 1,100 climb to get home. Something else to take into consideration as far as the winter driving is that colder air is denser and does have an impact. I have some experience racing planes and just 10 degrees makes a very noticeable difference in speed, the colder air the slower and being the brick that the JT is I suspect that may have a bigger impact than winter fuel blends.

I don't notice a difference with the SS on or off. Maybe on a long enough timeline.

 

[4-Low]

Do the new Gladiators have the FAD motor or the block-off plate from the factory? The newer Wranglers delete the FAD system as a cost cutting measure, but it has the side effect of a more dependable design. I fear, however, that it's eating into MPG a little. My new 3.6 hasn't broken 15 MPG since I got it two months ago, and all my prior JL and JT 3.6s would see 17-18 pretty easily.

 

[Wildtoad]

My '21 Willys gasser hard top is stock except I quickly swapped out the MT's for HT's. (caught some junk for doing that) Got a much softer, quieter ride, mine is a asphalt/concrete only DD. I average 18-20 for my typical driving around town which is a mixture of stop and go, and interstate. Interstate travel over longer distances I seem to get in the low 20's. Being a retired old guy, I have very little need to get somewhere in a hurry, so 65-70 is about as aggressive I get, and have no need to outgun the guy next to me. Tire pressures are set to 38 which is what my sticker says, setting them lower has not shown any benefit.

I did record a MPG number of high 30's once, but that was when I was towing the Jeep behind my motorhome and forgot to turn the engine off, all other steps for towing were proper. I don't recommend do that!

 

[Hootbro]

You guys are slacking. 4 pages in and I have to be the first to post the cow/jeep aerodynamics pic?

 

[Volt0]

Also check that your oil level is near the middle of the range on the dipstick ( not too high ).

air filter.

alignment.

Idle too much ( early morning startups, drive through, … )

electric draw ( have your batteries tested )

windows down or doors/roof off

pcv

Fwiw, my mileage isn’t what I expected either. My JTM is usually 1-2mpgs less than my wife’s JTHA, all year round. Hers is closer to EPA estimates.

 

[JTGuy]

I only check my MPG when I am going down hill.

 

[RacerAV]

Yeah, I get like 11.5-12.5, lots of city driving, high RPMs cause I'm always in a hurry, stock Mojave on 37s and slight lift, with Decked, gear in the drawers, steel front bumper with a winch... whatever. Installed paddle shifters, sometimes I'll try to use them and shift below 3k, that helps but I'll forget and all the sudden be red lining wondering why it's not shifting lol...

 

[Stan H]

Do the new Gladiators have the FAD motor or the block-off plate from the factory? The newer Wranglers delete the FAD system as a cost cutting measure, but it has the side effect of a more dependable design. I fear, however, that it's eating into MPG a little. My new 3.6 hasn't broken 15 MPG since I got it two months ago, and all my prior JL and JT 3.6s would see 17-18 pretty easily.

Block off plate.
It did not increase dependability because the block off plate still has a set of forks bolted to the back side of it holding the slide lock ring in place keeping the front axle locked.. buy a FAD motor run it to a aux switch or a toggle switch. Problem solved.

 

[4-Low]

Block off plate.
It did not increase dependability because the block off plate still has a set of forks bolted to the back side of it holding the slide lock ring in place keeping the front axle locked.. buy a FAD motor run it to a aux switch or a toggle switch. Problem solved.

Interesting. So they really did take the cheap way out. Of course they did.

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