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31-34MPG in Colorado with 85 octane. I have a 2106 Rene Latitude Manual 1.4L and drive 70-30 Highway to City. I have found that if you shift before 3000 rpm and maximize cruise control and keep the speed less than 72mph, I can reliably get 36mpg on the highway.
What elevation are you at? For whatever reason, I got the best mileage at an average of 4000ft when in eastern Oregon. It's not quite as good here on the Oregon coast.
 

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I have had the opportunity to compare 3 vehicles doing the exact same commute for at least 500 miles each. I drive each vehicle every week, so they all see similar weather and such.

20 mile commute. 3 Traffic lights, 2 stop signs. Pretty much all flat and level. 45 - 55mph cruising speed. One stretch is 13 miles non-stop. No traffic, no stop and go.

2015 Renegade
2014 JK
2008 GMC
All are automatics.

Renegade averages 22.8mpg
JK (3.21 rear) averages 20.5mpg
GMC Sierra Crew Cab (5.3l active fuel management engine) averages 17.8mpg

I am very happy with the JK (better than expected). GMC pretty much hitting what GM said it should get - it does spend most of the trip in 4 cylinder mode. Renny below expectation - seems to fit with other European vehicles that have a ton of Kentucky wind-age in the economy numbers.
 

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I have had the opportunity to compare 3 vehicles doing the exact same commute for at least 500 miles each. I drive each vehicle every week, so they all see similar weather and such.

20 mile commute. 3 Traffic lights, 2 stop signs. Pretty much all flat and level. 45 - 55mph cruising speed. One stretch is 13 miles non-stop. No traffic, no stop and go.

2015 Renegade
2014 JK
2008 GMC
All are automatics.

Renegade averages 22.8mpg
JK (3.21 rear) averages 20.5mpg
GMC Sierra Crew Cab (5.3l active fuel management engine) averages 17.8mpg

I am very happy with the JK (better than expected). GMC pretty much hitting what GM said it should get - it does spend most of the trip in 4 cylinder mode. Renny below expectation - seems to fit with other European vehicles that have a ton of Kentucky wind-age in the economy numbers.

I'm really surprised at how bad your Renegade is doing at those speeds. You have the automatic? Going that slow in the manual we can get 30 mpg pretty easy. Now, going uphill is a different thing...but you said your terrain was level.
 

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If you are getting bad gas mileage you need to take a look at the way you are driving. I keep the live mpg up on my HUD to keep an eye on when I'm heavy on the gas. I would recommend doing this to see how heavy you are on the gas pedal.
 

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If you are getting bad gas mileage you need to take a look at the way you are driving. I keep the live mpg up on my HUD to keep an eye on when I'm heavy on the gas. I would recommend doing this to see how heavy you are on the gas pedal.
I am moderate with the slug BU TH
I have 22.3 MPG lifetime
it never gets above 25 MPG in any condition
It barely does better than my SQ5
I actually did 1800 miles this week in a Santa Fe LTD Ultimate and got almost 2MPG better than I do on the same trip in the BU TH Considering how much bigger it is it shows what a modern emgine can do versus the 2.4L relic I have in the TH
 

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It's not so much the engine that's causing so-so gas mileage. It is a modern design that's fairly sophisticated for the segment. Before I got my V6 Cherokee, I had a fwd sport with the same 4cyl and 9 speed. It got exactly the same mpg as I get in my Renegade even though it's about 300-400 lbs heavier. It's because the Renegade is shaped like a brick. The Cherokee is very much wedge shaped and it makes a huge difference in mpg. Also, I found that by slowing down to 65 from 70 mpg easily gives me 3mpg better. I do a lot of highway driving and keeping it under 65 will consistently give me 30 mpg avg.
 

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I drive from the gym and to college from my house which isn't far at all.

College is 11 miles, lots of roads that stretch 40mph but there are lots of stops

Gym is a few miles lots of stops and "City Driving"

For some reason I get 16.9 Mpg now driving regularly to both places

When I drive economically and with cruise control, I'm lucky to even get 18.

A few weeks back I used to be getting in the low 20s and now its doing really bad.

This happened after I took my Rene to the dealership for an oil change (everything was fine with the oil and filter)

I checked my tire pressure, perfect. I checked my air filter, cleaned it. I did almost everything you could do to keep the car in its best condition

But somehow my mpg still suffers...

I need help!
 

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I drive from the gym and to college from my house which isn't far at all.

College is 11 miles, lots of roads that stretch 40mph but there are lots of stops

Gym is a few miles lots of stops and "City Driving"

For some reason I get 16.9 Mpg now driving regularly to both places

When I drive economically and with cruise control, I'm lucky to even get 18.

A few weeks back I used to be getting in the low 20s and now its doing really bad.

This happened after I took my Rene to the dealership for an oil change (everything was fine with the oil and filter)

I checked my tire pressure, perfect. I checked my air filter, cleaned it. I did almost everything you could do to keep the car in its best condition

But somehow my mpg still suffers...

I need help!
Hi EmmytheRenny,

Have you contacted your servicing Jeep dealership to let them know this has occurred?

Kori
Jeep Social Care Specialist
 

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mines gotten better with the miles, I'm averaging 29.6-29.9 now. regularly seeing high 30s and 40 on highway speeds. 1.4T 6 spd 4x4
I was told ours would get better with more miles, but it really hasn't, actually has gotten worse. I can't figure out why. Good for you, though!
 

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Update on my last post:

Just took my Renegade Trailhawk to the dealer because the hood decal had a cut through it and was bubbling up.

I mentioned the MPG knowing that 15.8mpg city is way off and the gentleman said he will look at it tomorrow and do a diagnostics!

I am dropping the jeep off tonight and they will inspect it tomorrow

I am glad they are looking into this because no way I should be getting 15-17.4 mpg city driving going 40mph a lot.... in Florida no less
 

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I just got home from a 2000 mile road trip in my 2017 TH that had 3000 miles on it beforehand. On the way out, I averaged 26.6 mpg which seemed about normal. But I did a little experiment on the return trip. Exact same route, but this time, I filled up with ethanol-free gas whenever I could find it, which was all but one tankful. The result: 30.3 mpg. That was a significant difference.
 

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Final Update Maybe?

Got my Renegade TH back from the shop.

Hood decal replaced, looked great!

They checked everything about the MPG issue.

Turns out everything is okay but the actual "avg MPG" reading measurement is off so they did a recalibration

Hopefully this fixes things
 

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Still averaging 16.9 mpg in suburb driving in Florida...

My trip odometer days I used 86 miles but I have 5/8th of a tank left..

Honestly I do not know what is wrong with my renegade I never got this bad of milage

I added some STP Fuel Injector Cleaner that I had laying around..

Hopefully that helps. Im going to run it another full tank of gas too see if anything changes..

If I need to go from a dead stop, it will ALWAYS say 4.7 Mpg on the RealTime MPG monitor. Even if I gun it or go very soft, 4.7 mpg. it was never that low I really do not get why this jeep has to be getting such bad MPG on me now.,.

It only has 10,000 miles...
 

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im getting 4 mpg less after my 1st oil change in my 17' TH. i have commute that's 20 city/80hwy that i used to average 27 mpg, after oil change it's down to 23 mpg. i used to get 360 miles per tank now i only get 300. Sucks getting 80 miles less per tank than the 16' Latitude w/ 1.4, 6 spd i traded in

Sent from my SM-G930V using Tapatalk
 

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im getting 4 mpg less after my 1st oil change in my 17' TH. i have commute that's 20 city/80hwy that i used to average 27 mpg, after oil change it's down to 23 mpg. i used to get 360 miles per tank now i only get 300. Sucks getting 80 miles less per tank than the 16' Latitude w/ 1.4, 6 spd i traded in

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@ROBINSONMAC

Same here! It all happened after the oil change... But how could an oil change impact it so much they put new oil and new filter in...
 

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@ROBINSONMAC

Same here! It all happened after the oil change... But how could an oil change impact it so much they put new oil and new filter in...
Did you ask if they did any software updates when the oil was changed? Check your invoice, I have heard of software updates that did not complete correctly messing things up. If all they did was the oil change it does not make any sense unless they possibley disconnected something.
 

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Did they use the correct oil? Wrong oil type can affect mpg. The 2.4 Renegades use 0W-20 low viscosty and the 1.4 uses 5W-40 synthetic. Check your invoices for oil type used.
 
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