2021 Grand Cherokee Laredo X Poor Gas Mileage - JeepForum.com
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post #1 of 21 Old 07-23-2021, 12:55 PM Thread Starter
417JeepGC
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Exclamation 2021 Grand Cherokee Laredo X Poor Gas Mileage

I purchased a 2021 GC Laredo X V6 AWD a couple months ago. I LOVE it! The only issue is that I am getting just over 14MPG blended City/HWY, around 70% city 30% highway. I have been taking it easy and not rapidly accelerating. I have tried resetting it and I have ran 87 octane with and without ethanol with no measurable difference. Stock 20 inch wheels, zero mods outside of window tint. I called the dealer and they said they cannot test anything until it has at least 7500 miles, I am at 2700 miles right now. Any ideas? I was hoping to get closer to the 18 MPG City that was advertised.

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post #2 of 21 Old 07-23-2021, 01:19 PM
222Doc
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these hand calculated figures? Might get better as it breaks in a bit but not much. 14 is rather low for something made 2021. stock too. heck my near 10 year old JKR on 37s gets that. on 35s it did 17mpg and stock at best was 19 with the 4.1 gears it has.

my 3.6 dont like 87, uses the next grade up like 89. even new it never ran right on 87 had some ping in it at load. 89 no more ping.. Might help some?

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post #3 of 21 Old 07-23-2021, 01:30 PM
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Are these a lot of short trips with plenty of idling, or mostly trips of more than 10-15 miles?

I just got lost in thought. It was unfamiliar territory;
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post #4 of 21 Old 07-23-2021, 01:42 PM
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Stop and go, they suck, period. With 5,000# getting moving over and over again, takes fuel. Add in hills, and they suck even more. My 2012 was probably the worst around town of anything I have owned since the carb days. On the highway it would edge up to maybe 21, around town 12-13. BUT, that was a 5.7 and the old 5/6 speed auto. Newer ones I would fully expect to be over 15, maybe higher, but never 18 for MY driving around here. Nothing gets rated city miles around here. Now highway miles, I typically exceed, and true combined driving I typically exceed.
My only suggestion is to compare it to other cars that you have driven, with realistic averages that you got typically with same driving. My 12 Overland got worse MPG around town than my 392 (6.4) Challenger, but LESS MP$ due to running much cheaper gas.
Also what does it get on flat highway constant 65MPH? If not pushing 23 or higher, then I would be concerned.

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post #5 of 21 Old 07-23-2021, 01:55 PM
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I seriously doubt you'll ever see anything close to 18 MPG. With the 2018 - 2020 V6 loaners I've had, usually not more than 15-16 combined, 23+ for pure highway. My Hemi TH does about 13.5 combined, 20 MPG highway.

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post #6 of 21 Old 07-23-2021, 04:27 PM
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You should get much better gas mileage than this unless your city driving is in NYC or San Francisco. It may be just because the engine needs to loosen up. I have the older model with the 5-speed auto and the same AWD system, the only time I see 14mpg is when I am offroading. On my pre-covid, stop-start commute I could still achieve 18 mpg. On a road trip it was more like 25+mpg, for example, I can drive to Tahoe which is about 225 miles each way and over 8,000ft mountain passes plus local driving to ski resorts and still arrive home with gas in the tank.

Have you released the parking brake I am only joking but it may be worth checking your brakes are not hot, this would imply binding brakes and also check your tire pressures.

If everything is good wait until you have run up a few more miles before panicking.
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post #7 of 21 Old 07-23-2021, 08:41 PM
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My 2018 HA 3.6 regularly gets 21-22 mpg as a dd in mixed driving (calculated). During a recent trip where I held the speed at or slightly below the 70 mph speed limit the display showed 27.2 mpg when I arrived, after 2 hours of cruising on the interstate. I keep the tires at the door sticker recommended cold tire pressure and fill it with the recommended 87 octane.

Your 14 mpg combined seems a bit low for whatever reason.
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post #8 of 21 Old 07-24-2021, 05:03 AM
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Hmm, 1 post, negative, no responses. No location details, I wonder what the IP address is.

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post #9 of 21 Old 07-24-2021, 09:46 AM Thread Starter
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Yeah I drive about 17 miles each way to work every day. A bit of idling but nothing excessive. Iím in Southwest Missouri so traffic isnít terrible and I always turn off the auto stop! Very strange deal, not hand calculated Iím using the display of MPG.
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post #10 of 21 Old 07-24-2021, 10:05 AM
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Does gas there have a lot of ethanol in it? You could try a different station/brand as an experiment. Unless one of the wheel's brakes is hot, or the tires are near flat, its hard to troubleshoot without the specialized equipment the dealer has or lots of experience.
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I just got lost in thought. It was unfamiliar territory;
Current: 2011 Grand Cherokee Overland V8, 2009 Liberty Rocky Mt V6
Previous: 2000 Grand Cherokee Laredo I6, 1979 CJ7 I6 Quadratrac
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post #11 of 21 Old 07-24-2021, 12:52 PM
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I think this is more a case of driving conditions than anything actually being wrong with it. For instance, if I try to pull a mileage run and traffic is moving smoothly, I can hit 22 MPG with the TH taking it easy. Remember this is a Hemi running 275/65's. Same thing around town. Pure city with the cluster of working traffic, a drive through here and there and I'm looking at a solid 12 MPG. I would also suggest doing careful hand calculations for true mileage. The instrument cluster can vary in accuracy between cars. It should also do better as it gets more miles on it. The wife's Pacifica definitely picked up some MPG after the first 20K.
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post #12 of 21 Old 07-26-2021, 01:15 AM
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Be happy you get 14. My SRT gets 9 around town, 18 purely highway. The Trackhawk (707 hp) gets 8 around town (and thatís not driving it too hard) and 17 ish highway.

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post #13 of 21 Old 07-26-2021, 04:03 AM
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I just bought an 18' GC Overland 3.6 a few weeks ago. I've put about 800 miles on it so far and I'm getting around 18.6 MPG or so. The car now has just under 14,000 miles on it. about 70% HWY, 30% City driving in Connecticut running 87oct. 75-80MPh on the highway trips. Typical stop and go city traffic. I was actually rather impressed. I was only getting 21ish in my 19' Tiguan SEL R-line 2.0T running 93oct which was absolutely terrible that for that car.

14MPG is pretty disappointing but you probably need to give it more time
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post #14 of 21 Old 07-26-2021, 01:11 PM
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I also have the 2021 GC Laredo. I get 22 MPG with my mostly highway/some city driving. I even get 16 MPG hauling a trailer over the WV mountains.
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post #15 of 21 Old 07-27-2021, 06:43 PM
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That seems really low. Either something is wrong or you’re driving way more aggressively than you think you are. I have a 2021 GC Limited AWD V6 (18in wheels though) and in my suburban driving which sounds similar to the conditions you describe I average 20-21. Highway mileage has been shockingly good for me (25.5 indicated on a road trip from WI to Vegas and back). I did notice that the displayed mpg seemed a little low for the first few hundred miles, but I would say for me it corrected itself long before I got to 2700 miles.
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