Gas mileage

JLBoucher

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Rimouski, QC, Canada
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'21 2DR Willys 6MT
With my 6MT 2DR Willys, I get about 8,5L/100km on the highway when the weather is good (27,6 MPG). Cruise set to 112 or about. This thing eats miles.
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gbr

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Gerald
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Canada
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2020 JLUR
I just finished a 4890km (3038 mile) trip. My average speed was 95kph (60 mph). Over the trip, I averaged 13 l/100km (18 mpg). That's with the 3.6 8speed auto, regeared to 4.88 with full skids, front bumper, winch, and 38s (see below for full list).

Not bad, I'd say.
 

omnitonic

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Michael
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Southwest Virginia
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2021 JLU Willys in Sarge Green
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truck driver
I'm finding speed is key to fuel economy. I have the 3.6L and 6MT with 4.56 gears on a 2.5" lift with 35s. If I drive normally, running 70-75 mph to keep up with traffic, then I get as low as 15 mpg, which is down from the 22 mpg I was getting stock. If I put it in 5th gear and set the cruise for 60 mph, I can get up to 18 mpg out of the thing. It just depends on whether I want to keep up with traffic or be a rolling road block to save money. Speed KILLS fuel economy on this rig, the way it's set up now.
 

wingdog

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Sep 3, 2020
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California
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Subaru Crosstrek
I found stop and go or hilly roads really kill the mileage. It's usually not too far off from my subaru as long as I cruise under 75.

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Micky

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Virginia
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2018 Jeep Wrangler Sport S
i have gotten 27MPG once when on highway ............. with 30-35mph tail wind. Other wise 25 is the best i will get, and that has to be on flat coastal highways.
 

Luxy60

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NH
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'21 Sport Altitude, '17 Subaru Crosstrek
'21 stock Sport Altitude with 18" wheels, AT and HT. Current average is just under 21 (20.7) with ~ 400 miles on the odo (70/ 30 highway vs. intown). Trying to keep the highway speed between 60 and 70.
 

micahpop

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Jake
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Brea, CA
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2020 JLUR
Aha! Diesel! Thanks for setting me straight.

wingdog, my apologies...
 

jbcrane

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John
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Colorado
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2021 Jeep Wrangler Unlimited
OK, forgive me if this has been talked about many times before. I went on a four hour drive, all interstate, yesterday. I had the cruse control on probably 90% of the time. My Jeep, 2019 JLU Sport S with 2.0 turbo said 26.3 MPG. I don’t know how far off this is, but it sure looked good. Jeep is totally stock with HWY tread.
This September, after breaking my Sport S in for 5 months and 5k miles I did a 4,600 mile trip in two weeks from Colorado to Washington state, down the coast to San Francisco and home across Nevada. Stayed off interstate as much as possible preferring secondary, two-lane and dirt. I was shocked when I got home and saw my average mpg was 27.4. Stock Sport S with All-terrain tires, 3.6 and manual trans. significantly better than my previous Subaru ever got, with all the benefits of a Jeep. Happy as can be.
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