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Old 05-31-2017, 02:41 PM   #31
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2013 JKUR
4" lift > 4.10 > 35" tires (28psi)
17.4 mpg average (85% City) Running Chevron 89 octane gas

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Old 05-31-2017, 03:01 PM   #32
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Originally Posted by BOSSTANK View Post
2013 JKUR
4" lift > 4.10 > 35" tires (28psi)
17.4 mpg average (85% City) Running Chevron 89 octane gas
Why would you pay 15-20 cents per gallon more for a higher octane?

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Old 05-31-2017, 03:11 PM   #33
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2016 stock Sport 2DR with 3500 miles on the clock driving 80% Highway

I have hit 20 MPG a couple of times, but 16 to 18 MPG is 'normal'.

I 'hand calculate' my mileage (dividing miles by gallons at every fill). The result is usually one or two MPG less than the average I see on the EVIC.
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Old 05-31-2017, 03:13 PM   #34
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Originally Posted by d2mini View Post
Why would you pay 15-20 cents per gallon more for a higher octane?
Peace of mind I guess for a couple of bucks more...she seems to like it. I have always run 93 in my sports cars, street bikes, and 87 in my bass boats, atv's etc so I figure why not 89 in the Jeep.
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Old 05-31-2017, 03:56 PM   #35
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Originally Posted by BOSSTANK View Post
Peace of mind I guess for a couple of bucks more...she seems to like it. I have always run 93 in my sports cars, street bikes, and 87 in my bass boats, atv's etc so I figure why not 89 in the Jeep.
Fair enough, but just so you know, it doesn't do anything.
https://www.consumer.ftc.gov/article...ctane-gasoline

You're literally flushing money down the drain, but if the peace of mind is worth it to you...

Personally, I run what the manufacturer says.
My turbo cars require Premium (91-93), but if my vehicle calls for 87, I'm jumping at the chance to put 87 in it.
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Old 06-02-2017, 06:47 PM   #36
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400 mi. trip last weekend averaged 20 mpg towing my teardrop.
17 stock Rubi 3.73 gears.
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Old 06-02-2017, 07:43 PM   #37
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37's with 4.88's and the gauges show an average of 14.5 mpg. doesn't matter if in the city or the highway, it always reads 14.5, and i have reset it a couple times too. need to do hand calculations to see how accurate it is, but i bet actual is around 12.5-13.5.

but when im cruising at 55-60, im in 5th at around 2500 rpms, so that might have something to do with it.
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Old 06-02-2017, 10:13 PM   #38
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Originally Posted by BOSSTANK View Post
Peace of mind I guess for a couple of bucks more...she seems to like it. I have always run 93 in my sports cars, street bikes, and 87 in my bass boats, atv's etc so I figure why not 89 in the Jeep.


Because your owners manual says 87


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Old 06-02-2017, 10:21 PM   #39
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2016 rubicon unlimited, stock with 4.10.

25% city 75% highway, I get about 17 mpg.

If I drive speed limit I can get 19 or 20, but in California, 80 is the norm.

From Cali to Arizona I got about 20 mpg doing 75 the whole way.
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Old 06-02-2017, 10:25 PM   #40
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JKU with heavy armor on 37" MT and 4:88= 13 MPG mix of highway/city. Luckily i live close to work for now tho.

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Old 06-02-2017, 10:28 PM   #41
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I'm getting about 50 spg !!!!! thats smiles per gallon

But when i use mpg its 16 average i pull about and drive mostly city style

not sure the gears but 14 rubi 35x12.50's
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Old 06-02-2017, 11:37 PM   #42
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Because your owners manual says 87


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Guess I will be switching to 87 then
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Old 06-02-2017, 11:42 PM   #43
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First tank of gas used up and Ma's Buggy is averaging 17.5, mix of city and one 120-mile round trip on the highway.
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Old 06-05-2017, 12:09 PM   #44
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Not really sure, since I have not Pro-Cal'd the jeep since going past 32" tires. When speedo says 40 MPH, GPS says 41. The MPG readout usually hangs around 16.5 MPG. I changed my air filter Saturday and when I checked the MPG readout on Monday and it was 17.1. I'm never that high on this readout, but the filter probably had not been changed in a year.
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Old 06-05-2017, 12:18 PM   #45
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Fair enough, but just so you know, it doesn't do anything.
https://www.consumer.ftc.gov/article...ctane-gasoline

You're literally flushing money down the drain, but if the peace of mind is worth it to you...

Personally, I run what the manufacturer says.
My turbo cars require Premium (91-93), but if my vehicle calls for 87, I'm jumping at the chance to put 87 in it.
I worked at a gas station as a teenager in the late 90's/early '00's, and the number of people who thought the higher octane fuel was "better" for the car was astonishing. We had one customer who stopped coming when we switched over to Mobil from Sunoco because he could no longer get Ultra 94 .... for his Ford ASPIRE.

All my vehicles get 87 except for my LS1 Firebird, that actually DOES run better on 91-93 the is recommend in the owner's manual.

And damn, these things are pigs lol. Crazy you can get better MPG's in a full size V8 truck. I was just looking at a Silverado board last night, and a lot of guys with the 5.3 are getting close to 20 avg, with closer to 25 on the highway. Nuts. It would be nice if a LS swap was a factory option from Jeep.
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Old 06-05-2017, 12:20 PM   #46
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I get lower than a Prius.
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Old 06-05-2017, 01:07 PM   #47
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17 Unlimited Rubicon 4.10 auto. Stock tires and no lift, armor or other goodies.

I drive mostly country roads (50 mph) and highway (70-75 mph) and I can usually average 18 or so. I don't consider that terrible since my wife only squeezes 21-23 out of her GC with the same 3.6.

When I first got the jeep (oct 2016) I was in shock over the winter mpg (16-ish mpg), I've now come to accept that the mpg is what it is and don't wince when I have to fill it up anymore.
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Old 06-05-2017, 01:57 PM   #48
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I am down to 16.7 in town.
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Old 06-05-2017, 02:58 PM   #49
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Background: I would say my foot is just a little bit heavier than your typical driver (also, my Jeep is quite heavy, but offsetting that is the fact that 95% of the time, I am the only person in the vehicle).

City: 12-13

Highway (usually driving between 75-80): 14-16
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Old 06-05-2017, 05:21 PM   #50
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2008 JKU Sahara Softtop; stock everything except front bumper - 20MPG (+/-) mostly highway.
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Old 06-05-2017, 05:39 PM   #51
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16 - 18.5 depending on how much city vs freeway vs trail time, vs up-hill mountain driving.

2015 2-door 6 speed with 35" KO2, full steel skid system, winch, steel bumpers.
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Old 06-05-2017, 07:17 PM   #52
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I worked at a gas station as a teenager in the late 90's/early '00's, and the number of people who thought the higher octane fuel was "better" for the car was astonishing. We had one customer who stopped coming when we switched over to Mobil from Sunoco because he could no longer get Ultra 94 .... for his Ford ASPIRE.

All my vehicles get 87 except for my LS1 Firebird, that actually DOES run better on 91-93 the is recommend in the owner's manual.

And damn, these things are pigs lol. Crazy you can get better MPG's in a full size V8 truck. I was just looking at a Silverado board last night, and a lot of guys with the 5.3 are getting close to 20 avg, with closer to 25 on the highway. Nuts. It would be nice if a LS swap was a factory option from Jeep.

I totally agree w/ a V8 option. I was able to routinely get 19 mpg in my previous Mustang ('12 GT) and it had 412hp! Granted, it wasn't nearly as heavy, but still. Heck, I average ~20 mpg in the city and 30 mpg cruising at 65-75 mph in my '84 911. High power to weight ratios can equate to great mileage when not pushed to their limit.


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Old 06-05-2017, 07:28 PM   #53
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I totally agree w/ a V8 option. I was able to routinely get 19 mpg in my previous Mustang ('12 GT) and it had 412hp! Granted, it wasn't nearly as heavy, but still. Heck, I average ~20 mpg in the city and 30 mpg cruising at 65-75 mph in my '84 911. High power to weight ratios can equate to great mileage when not pushed to their limit.


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Aerodynamics has more than a little to do with it. Both of your examples have an aerodynamic cross section of probably about 25% of a wrangler, plus they are doing everything they can to keep air out from under the car with air dams etc.

I get about 16-17 according to the computer, but I've noticed that it's pretty optimistic.
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80% around town, but when I'm on the highway I'm usually 70-75 and lately about 1/2 my highway miles have been with a Kayak strapped to the top.
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Old 06-05-2017, 07:42 PM   #54
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Aerodynamics has more than a little to do with it. Both of your examples have an aerodynamic cross section of probably about 25% of a wrangler, plus they are doing everything they can to keep air out from under the car with air dams etc.



I get about 16-17 according to the computer, but I've noticed that it's pretty optimistic.

2016 JKU Hard Rock Auto/4:10's

80% around town, but when I'm on the highway I'm usually 70-75 and lately about 1/2 my highway miles have been with a Kayak strapped to the top.


Totally agree - I just didn't mention it. When I had my bike rack on my MINI I would average at least 1 mpg less, and no, it wasn't THAT good (23-24).


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Old 06-05-2017, 08:22 PM   #55
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2017 2 Door Big Bear, 3.73 and 6 speed manual.

It's only up to 1,600 miles, but I've been averaging 19 MPG doing a mix of city & highway.
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Old 06-05-2017, 08:40 PM   #56
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I get 10. I deliver mail, 75 mile route, 700 stops 8 gallons a day
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Old 06-05-2017, 09:28 PM   #57
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I get 10. I deliver mail, 75 mile route, 700 stops 8 gallons a day
I've got a 2017 6 speed manual rubi 2-door 4.1

The "average" in the OP's question is going to be all over the map. some people consider suburban driving of one light or stop every 2 miles and 20 to 40 mp most of the time to be "city". My city driving is a stop or light every single block, lots of hills, lots of traffic and speeds of dead stop idle in traffic or at lights, and 1 to 20 mph.

If i reset MPG Monday morning and just use the vehicle to take my kids to school in our city that week, I get 9 miles to the gallon. No exaggeration. I have a photo of it being 8.1 mpg!

On a no traffic 60 mph highway I get 20.5 at 50mph i get 21.5.

I have a friend who ubered with a 4 door JK for a month before doing the calculations and realizing virtually any cheap modern sedan cost about $4,000 less per year in gas alone. But that is assuming 25k miles of actual city driving. For most of us it is costing about $1,000 to $1,500 more a year in gas than say a competent AWD like a subaru.

If you drive a lot and a lot of it is decent speed highway 70 mph or more (where the absurd aerodynamics also take a big toll) , or actual city, you just need to be aware the JK is the ultimate dog on mpg. I haven't seen anything guzzle gas like it since my 64 T-bird. If you don't drive a lot, or if it is a second car this is less of an impact.

I love my JK and bought it with my eyes open about this probably costing me $10,000 in gas more over the life of a car than alternatives.
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Old 06-05-2017, 09:36 PM   #58
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Arrow Fuel economy, speed, and drag coefficient...

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Originally Posted by 817rubicon View Post
09 Rubicon. Avg 12 mpg. 80% HWY driving.

Stupid jealous of y'all getting 18mpg
LoL but you have a rural Texas Freeway with an 85 MPH speed limit - driving an "Aero-Brick" (Jeep Wrangler) at those speeds ~90 MPH will suck some major fuel...

At the most basic level, drag is proportional to the square of speed

World's 10 Least Aerodynamic Vehicles (Cd = Coefficient of drag) listed worst to least bad of the bad...

1. Lotus Seven
(old roadster) Cd value:_______0.65-0.75
2. Jeep Wrangler Cd value:__0.58-0.55
3. Hummer H2 Cd value:_______0.57
4. Mercedes G class Cd value:__0.54
5. Dodge Ram 1500 Cd value:___0.52
6. Nissan Patrol GR &
Ford Maverick Cd value:_______0.52
7. Volkswagen
8. Westfalia Camper Cd value:___0.51
9. CitroŰn 2CV Cd value:_______0.51
10. Volkswagen Beetle Cd value: 0.48

Link source for above
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Old 06-05-2017, 09:40 PM   #59
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I have a 2016 Wrangler Sahara unlimited soft top, 4 door, 6 speed manual, driving 55 ,I get 25 Mpg. I think the soft top is lighter, adds to MPG.
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Old 06-05-2017, 09:54 PM   #60
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Originally Posted by d2mini View Post
Fair enough, but just so you know, it doesn't do anything.
https://www.consumer.ftc.gov/article...ctane-gasoline

You're literally flushing money down the drain, but if the peace of mind is worth it to you...

Personally, I run what the manufacturer says.
My turbo cars require Premium (91-93), but if my vehicle calls for 87, I'm jumping at the chance to put 87 in it.
I have a 16' JKUHR. What makes a bigger difference is whether your fuel has ethanol in it or not. Here around Houston, I get around 17-18 in the city (but mostly freeway). Out in the country, I get 20 sometimes 21. Up in Michigan where I can get ethanol free fuel.... I've run as high as 24.
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