Terrible 2.0 gas mileage?

[RoadiJeff]

Our 2020 JLU Recon 2.0T is my wife's dd. She averages 22 mpg with it, vs 17 mpg she used to get with her old 2013 JK 3.6L

She usually fills it with premium, occasionally 87 octane.

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[Chupacabra]

Lifetime average on my '21 2.0 is 22 MPG (hand calculated number). Never had a tank below 20 yet. Mostly commuting to work, half highway high side roads. About what I expected based on window sticker.

 

[Go Outside]

I just finished a 1000 mile round trip from SF to Vegas along the CA/NV border (not exactly), at times I was averaging 23mpg, but by the time I got home I had averaged 19mpg. A 70mph speed limit with a headwind put a hit on the gas mileage.
At 10,000miles I'm averaging 18mpg mostly commuting 50/50 city/highway. Speeds above 65 and any incline increase fuel consumption dramatically. Hard starts in town seem to have less of an effect than anticipated. I think if I stayed below 65mph I would average mid 20's.
I run 91 octane, stock Firestone MT's.
These numbers are from the dashboard which was optimistic when new, but I haven't verified it in a year. I should probably do that next tank or three.
This is the first car I have ever owned that gets worse mileage on the highway. My last car, a Honda Element got 18mpg on the same commute (driven much harder) and 24mpg freeway at 80-95mph. The element has a similar shape but was lower to the ground and had passenger tires.

 

[PLDJ1000]

2021 JLU completely stock with 2500 Mi...

I'm getting a solid 22.5 on average with 20% city and 80% highway daily commute.

The best I've seen was 26.5 for a full tank and I have no idea how that happened. I guess the perfect fuel / speed / wind combination.

 

[Sgt Beavis]

We drove our new JLUR from Denver to Breckenridge last weekend. That's a significant climb and we were getting 16mpg. Keep in mind that I was heavy on the accelerator. I'm sure I could have gotten 18mpg.

Coming back from Breck (mostly downhill) with my wife driving, the avg MPG jumped back up to 22.3. Through the rest of the week my wife has maintained 22.5mpg. She is much lighter on the gas than I am.

We've gassed up with 87octane.

 

[calvinf1]

On stock 32" tires, I was getting 23 mpg on highways going about 70mph on a 400 mile road trip on 87 winter gas. Must say it is better than I expected. I have a 2020 with 10K miles on it.

 

[rowdy4466]

i would get 22-24 with standard eqp when i bought it. now a lift and 33" mt tires and i get 15 on average and i drive about 75mph on the highway. try using the gear shift on highway runs and put in a gear that is above 2k rpms, low rpms makes it shift too much. just my experience and opinion

 

[Charlymoody]

My Sahara 2021 2.0 is giving me very low mileage as well. A positive side note is that the tire change from stock to 35s didn’t affect the fuel. It remained the same. After reading thru this thread I will wait until I break it in and reach 3 to 5k miles.

Has anyone an idea why the current status is showing 99 when the metricSystem is not used and the engine is on?

 

[JJMalone]

Less aerodynamic then a cow!

 

[bbuck7777]

Mostly in town driving (~85%) at 5,200' elevat and freeway at 70-75mph. Not bad!

Heads up that the trip settings can only go to 9999 before they reset to 0! Happened at the last reset and missed the first 9999 mile average total. Will try to remember to catch the 9999 redaings before they reset.

 

[Go Outside]

200 mile trip from sea level to 5000 feet and back. Mixed driving, 65-70 on the highways. 10,000 mile service last week.
Dash reported 23.7mpg
Manually calculated 22 mpg.
Better than expected with Safeway premium fuel.

 

[cocaine_white]

So the first about two months of my jeep being bone stock running only 93 with my stupid heavy foot i was averaging 19-21. Lots of hwy driving would put towards the bottom of 19, country backroads would would bring it into the low 20's. Now a year later with 37's on beadlocks, 2.5" lift, stubby front bumper and winch, aftermarket steel rear bumper, and the same heavy foot im averaging about 14.5. Out of curiosity i wanted to test the mpg on 87 vs 93 so i ran 4 tanks on 87, two tanks of 93 but disregarded those as i figured there'd still be some 87 sloshing around in there, then 4 more tanks of 93 and what i came up with was maybe 1/2 mpg better on 93. All of this calculated the old fashioned way not going off the dash said. Also realized that i was actually getting about 1 mpg less than what the computer was telling me

 

[Chupacabra]

200 mile trip from sea level to 5000 feet and back. Mixed driving, 65-70 on the highways. 10,000 mile service last week.
Dash reported 23.7mpg
Manually calculated 22 mpg.
Better than expected with Safeway premium fuel.

I deduct 1.5MPG from the dash display and that's pretty close to actual MPG when hand calculated. Looks roughly the same as what you are getting

 

[Go Outside]

I might try running some medium grade fuel and see what happens.

 

[PLDJ1000]

Ok...

I got 3500 Miles on her now so:

89 Octane / Non-Ethanol Fuel = Averaging around 25 MPG per tank of fuel.

I've seen as high as 26.5 and low of 23.5 (per tank) doing about 55-65 MPH highway and 45 on backroads.

I do drive slowly as to spend as much time in my Jeep as possible...

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