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02-09-2020
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Established Member
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Join Date: Jan 2020
Age: 39
Posts: 106
Likes: 1
Liked 3 Times in 3 Posts
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JK 3.6l fuel economy
What’s everyone getting for fuel economy.
Mine is sitting at 17l/100 stock, haven’t lifted or done larger tyres yet. It has the 3.73 gearing.
Is there a magic button to get better mileage?
Sent from my iPhone using Tapatalk
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02-09-2020
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Full Flexer
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Join Date: Jan 2008
Location: North East Victoria
Posts: 512 What Jeep do I drive?: JK
Likes: 12
Liked 22 Times in 17 Posts
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What sort of driving are you doing?
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02-09-2020
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AJOR Bronze
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Join Date: Mar 2014
Location: Lake Macquarie, NSW.
Age: 55
Posts: 2,603 What Jeep do I drive?: WK2
Likes: 793
Liked 1,248 Times in 855 Posts
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Quote:
Originally Posted by aevo88u
What’s everyone getting for fuel economy.
Mine is sitting at 17l/100 stock, haven’t lifted or done larger tyres yet. It has the 3.73 gearing.
Is there a magic button to get better mileage?
Sent from my iPhone using Tapatalk
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Jesus, my 3.8L JKU wouldn't drink that much even with all the gear I had fitted.
The only time I'd use that much was when I was towing my camper trailer.
__________________
Cheers,
Jamie
MY15 WK2 GC Limited 3.0L. Ironman lift, bullbar & winch. Uneek rack & sliders
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02-09-2020
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Established Member
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Join Date: Jan 2020
Age: 39
Posts: 106
Likes: 1
Liked 3 Times in 3 Posts
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Just standard driving, last couple of days I’ve been keeping it in the eco “between 1k-2.5k” and I got it to drop from 18.5 to 17.8.
So it is abnormal. Anyone got any ideas at what to look at?
I used JScan app and confirmed hearing and tyre ratios are correct. Also confirmed no errors.
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02-09-2020
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SwampDigger
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Join Date: Jul 2010
Location: Blue mountains, West of Hell
Posts: 3,765 What Jeep do I drive?: JK
Likes: 1,481
Liked 540 Times in 399 Posts
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Seems high for a 3.6. My 4L inline TJ got around that, and the 3.8JK gets around 15km/L with just local driving here in the Mountains. (With the extra gear on it.) Lower when sitting on 100 on the motorway, or longer trips that aren't stop/start.
__________________
Jeeps: Lego for grownups!
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02-09-2020
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Established Member
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Join Date: Jan 2012
Location: Algester QLD
Posts: 131 What Jeep do I drive?: WH
Likes: 9
Liked 30 Times in 19 Posts
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I had a 14 Rubicon on a big lift with 35s, roof rack, bullbar, sliders and a heavy ass Kaymar rear bar on it and it did around 17 litres per 100km with me caining it everywhere. I would expect a stock one to do better than that.
Put a couple of tanks of 98 (with no ethanol) through it and drive it aggressively everywhere (plenty of trips to the redline). Make sure your tyres have plenty of pressure in them, make sure the air filter isn't super dirty and if its auto make sure the torque converter lock up is functioning properly. After all that go back to normal fuel (no ethanol) you should be able to get at least 13-14 litres per 100 around town and 11ish on the highway.
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02-09-2020
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CrawlerStar
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Join Date: Aug 2015
Location: Sunshine Coast
Posts: 355 What Jeep do I drive?: JK
Likes: 74
Liked 111 Times in 81 Posts
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Has your fuel economy always been that high? Do you do a lot of city driving or in slow traffic?
My modded 3.6 JKU sport gets around 14L/100km daily based on the dash readout, 15-16L/100km when towing and usually around 18L/100km off-road or on the beach.
__________________
The average human walks 1,500km per year and drinks 83L of beer which means we're getting 18km/L.
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