Gas mileage Baddd
 

I knew the 07 rubicon unlimited i bought was not a great on gas but it took 66liters to do 305kms witch works out to 21litres per 100kms that crazy,in gallons it 14.5 to do 189 miles basicly 13 miles to a gallon and i dont drive it hard does anyone get better or is this the norm

Re: Gas mileage Baddd
 

I checked my '08 Sahara JKU on a trip from Ottawa to North Carolina (almost 5000 km) and the mileage was consistently 17 mpg US, which converts to 13.8 litres per 100 km. I've noticed that he doesn't like stop and go traffic and drinks a little more if I take him to the office :)

Re: Gas mileage Baddd
 

Thanks for the reply

Re: Gas mileage Baddd
 

That sounds about right. I have a 2011 JKU and if we drive from the GTA to Ottawa or futher I can get anywhere from 10-13 ltr/100km, but in town it can be around 14-18 ltr/100km all depends on stop and go and driving styles. I will admit I've never driven a vehicle that can be so random in it's mileage. I do still love my Jeep either way!!

Re: Gas mileage Baddd
 

That's way to high. Im running 4.5" lift and 35's. Mine is 15/L per 100kms. That's combined.

Re: Gas mileage Baddd
 

I was getting 15-16l per 100km, on the highway. I changed my leaking exhaust manifold and I'm now 10 -12L per 100km on the highway. In the city around 13-14L per 100km. I also have the hypertec programmer regular tune. Running 33 and 3.5 inch lift.
In the city try turning your OD off.

Re: Gas mileage Baddd
 

Just fueled up the rubicon again and got 315 km on 64 liters wich still is only 12-13 miles to a gallon or just over 20 liters per 100 km i only have 41,000 km on it and it runs great dont think i need a tune up,the only thing i can think of is its real cold here and i do let it warm up 10-15 min before driving my daughter to school every morning and there is little to no hightway miles

Re: Gas mileage Baddd
 

I think you really just answered your own question. The 3.8L is not as good as the new 3.6L, cold weather, burning up gas letting it warm up, winter fuel, mainly city driving.... I think that about answers it. Sorry I couldn't give you better news but tough it out and the summer will be a bit easier for you.

Re: Gas mileage Baddd
 

I have a 2011 2 dr sport. It definitely is alcoholic! Drinks way too much!
I have changed all fluids in the Jeep to Amsoil Synthetic.
FR & RR diff, trans and motor. Keep tires at 35 - 37 lbs
Under 80km I do about 25+ mpg,
Under 100Km. I do about 21 - 22mpg. Over 100km I get about 18 - 20mpg.
I use cruise all the time. Wind in my face changes everything.
I also find that in city if I can get it into 5th gear I get the best mileage
.
If you are letting it idle for 15 minutes, say goodby to gas mileage!
If you are automatic I don't think you will do so well either.
Rubicon diff ratios are higher than all the other models.
X and Sport, Sahara have 3.21 std - Sahara with tow 3.73 - Rubicon 4.21 std.
The higher the ratio the higher the revs in all gears = more fuel at all times.

Re: Gas mileage Baddd
 

I thought this was a cdn site? What's with the mpg?


FYI rubicons have 4:10's.

On a side note my rubi that had no lift and 35's got better gas mileage then my wife's bone stock Sahara.

Re: Gas mileage Baddd
 

Sahara with tow package got 4:10's in 2007 and 08

Re: Gas mileage Baddd
 

They got them in 07 and not in 08. I know this because I owned two 08 saharas. Both with tow package and 3:73's.

I was just stating that the rubi came with 4:10's not what the post before me stated.

Re: Gas mileage Baddd
 

Nothing is going to help with gas mileage enjoy the Jeep:)

Re: Gas mileage Baddd
 

I have a 2011 Sahara Unlimited with 3.73, 6-speed. I drive ~ 99% city. I am getting 15-16 liters per 100 km. So the mileage that you reported is very low. And you mentioned that your rubi has better mileage than the sahara - interesting.

My suggestion is that change your morning idle from 15 minutes to 30 seconds. Put on the coats and gloves. Check the mileage again in the next fill up.

Re: Gas mileage Baddd
 

cold idling is apparently bad for modern engines, it will warm up quicker being driven

Re: Gas mileage Baddd
 

Definitely a cold weather issue.. I get 13.1-13.8 l/100klm (17-18mpg) mixed with my 08 Sahara with 3.73 A/T running OD off, 3.5" lift, 35" Pitbulls, and Superchips programer. The programer will make a big difference and allow you to run premium gas properly. I cancelled my 12 Ruby order because I like the way the programer works.. I test drove a 12 and was happy to get back in my 08.. However, I do like the new 5sppd A/T trany..

Re: Gas mileage Baddd
 

Some of us are still old enough to remember MPG and think that way. I still convert L/100kms to MPG (UK) cause that's what I'm used to. You can have your L/100kms but not this CAT!

Not all Rubi's have 4:10's, that would be incorrect! When I order mine (6spd) I could get it with 3:73's (default was 4:10's) but the Auto comes standard with the 3:73's unless you specifically order it with 4:10's.

I'm getting 21 MPG (UK) on my JKUR with 4:10's and hope to get better when it's broken in a little more. So, what's that in L/100kms? 12 or so?

Re: Gas mileage Baddd
 

Replies here indicate that non of the ratios are firm and you can pretty well get what you want in many of the Jeep models.
I too am old enough to still use mpg over km/l.
Most of the new Jeeps have both available in the readouts and you are able to jump back and forth with a button.
My 2011 Sport only has 6500kms on it and I can feel it starting to loosen up and getting better gas mileage as it does. As I mentioned in another reply that I have changed all fluids to Synthetic and I believe that is letting it run smoother.

21mpg is about 13.5 l/100km

Re: Gas mileage Baddd
 

That's brutal, I get around 12L/100 Km mixed driving with winter tires on my 2011 Sport; I have the 3:21 diff and 6 speed manual and am ereasonable on the go pedal most of the time.

Re: Gas mileage Baddd
 

So it improves after break in? That's something to look forward too. Our last vehicles, ( 2010 Tacoma/ 2006 Corolla ) got worst! I've never gotten what the Manufacturer sticker says, it's always 5+ MPG less in reality. But we live in the real world don't we? Hills and wind!
The display is switchable but it reads MPG (US) and distance to empty is in Miles. Too bad it wasn't MPG ( UK ) for us here in Canada.

Re: Gas mileage Baddd
 

Just filled up my JKU sport today. It took 74L to go 550km, mixed city and hwy driving. Not bad, and its noticeably better when the weather warms up.

Re: Gas mileage Baddd
 

Idling kills. As said before 30 seconds is good, max a couple of minutes. Being in the right gear helps, no od in the city should net a couple benefits.

My 2012 wrangler unlimited sahara's last run was 455kms on 66 litres, so i think that is around 14.5 l/100 kms all city driving loaded with 100 lbs of equipment.

Good luck and play around with your driving style and gear choice and let us know if any improvements occur!

Take care

Re: Gas mileage Baddd
 

I've heard a cold air intake and a programmer will help. I haven't decided which or whether both are needed. About $300 for each.

Re: Gas mileage Baddd
 

The Programmer will definitely help, I currently average around 13-14L/100klm with 35's mixed city/hwy...
The general consensus on the CAI is they don't make any difference and make the engine more susceptible to taking in water.. On the other hand a good snorkel will force more air in and protect the engine while going through deep water...

Re: Gas mileage Baddd
 

I agree, by the way, what government moron decided to change the entire format with metric, miles per gallon should have been converted to kilometers per litre. It would make so much more sense. Government cranial rectal inversion at its finest.

Regards

Re: Gas mileage Baddd
 

I just drove a 2012 Sahara 4 dr on the weekend. Pretty peppy compared to my 2011 Sport. Gas mileage was pretty close to mine though. [looking at the l/km/mpg gauge.

What are you guys with 2012 2 dr models getting with your JK's and are you happy with the power upgrade?
Seems the new motor has more balls [about 80 hp] and they are supposed to be better gas mileage.
Would be interesting to know.

Re: Gas mileage Baddd
 

I've got about 15,000 km so far on my 2012 Sahara Unlimited (3.73)
A trip to Ottawa last weekend, city driving during the week and up to the cottage ( Mont-Tremblant this past week-end ) The cpu read 11.9 / 100km , gettting about 550 km per tank. Mixed in a little 4x4 this past week-end but only about an hour of trail exploring.