What Type Of Fuel Do You Use?
 

I thought this would be an interesting topic!

I found something interesting in my time owning my 2007 Honda Civic DX-G that I get 28 MPG on Shell Regular Gas and 31 MPG out of Esso Regular Gas! Even though there supposed to be the same fuel grade, I get different results very strange.

I was wondering if anyone has a particular about type/grade/brand of fuel for your jeep? I am especily interested in the 2012+ with the new Penestar motor, also the older 3.8L motors interest me too.

Side topic, does the older 3.8L motor really slug as bad as everyone has said? I've heard people saying the new penestar dosn't make use of the torque as well as the older motor did but it's brute force power unit makes up for it, thoughts?

Re: What Type Of Fuel Do You Use?
 

Interesting that your MPG is lower with Shell vs. Esso (or in Canada your L/100 KM is lower). From what I heard is that Shell uses less Ethanal than most fuel companies (I could be wrong).

But in anycase, mines a 2011 (I know you ask for 2012+) but you wanted a reference point with the 3.8 as well. I fill up on Costco 89. As for the sluggish 3.8....not at all. I had the chance to get the 2012, but I was happy with the 3.8 (I had a 2010 previously) + all the cash incentives they threw my way. Fuel consumption on stock wheels I get 11-12 L/100 KM, on 33's I get 12-13 L/100 KM (after tune), and 13-14 L/100 KM without tune (consumption is based on dash reading, I don't calculate it myself anymore).

Power is all relative. Prior owning a Jeep I had a little Toyota 4 banger.....so going to the 3.8 was like heaven...and still is.

Re: What Type Of Fuel Do You Use?
 

Right on, I know what you mean for sure. I'm going from a 1.8L to a 3.6L manual it's like getting into a rocket ship for me. I do live in canada but I still calculate fuel usage in imperial because that seems to be the only way otherwise I'd be converting everything i read online.

I thought it was strange too, but I was getting almost 100kms more out of a tank using ESSO over Shell. Not to mention the fuel guage itself would drop at different areas then ESSO did, i'd get a huge drop the first quarter with Shell, then it would level off around half way, ESSO it would be level the top half and drop the second half. Very strange..

Re: What Type Of Fuel Do You Use?
 

Shell v power with a Diablo Sports performance tune for 91. Feels like a new jeep with the tune.

Re: What Type Of Fuel Do You Use?
 

I like your stinger, is that smitty built?

Re: What Type Of Fuel Do You Use?
 

Let me start by saying I like my 3.8L, solid engine with 130,000klm runs like a top and always starts no matter how cold. coming from a compact car and a 98RAM with a 5.2L the 3.8L is fine with me. Had I switched from a HEMI RAM or a Challenger I am sure I would not have been happy with that power drop.
I too ordered a 2012 then cancelled the order, I really didn't feel the 3.6 was that much better then my tuned 3.8 to justify the trade up.. The 5spd auto in the 2012 on the otherhand is much better then the 4spd auto on the 3.8..
So back to fuel, Around here i seem to get better mileage on Husky fuel 87 octane. Before mods I was able to get 23-24mpg hwy. Now with mods, In the summer I run TowTune on 91 Octane for the best mileage.. As it stands I have been able to pull up to 19-20 mpg on Husky 91 Octane, with heavy 35" tires, tuned for 91 Octane. The operative word is TUNED, running 91 Octane without a tuner may net you worse mileage then running 87 Octane.
The trick to better mileage is very dependent on your driving style.

Re: What Type Of Fuel Do You Use?
 

Well thats great info. But I don't see myself getting more then 21mpg, because I did a run upto Midland on the weekend and the best I was able to get the computer to spit out is 21MPG and thats just doing the speed limit if I went over it would drop to 18mpg. But I havn't broken in my motor yet so who knows right now. I heard the 3.8L was worse on fuel then the 3.6L. I havn't driven the older 3.8L so i have no idea what it feels like, but I know this 3.6L has a ton of power and pull and I enjoy it over my 1.8L :-P

So far with half and half city and highway im around just under half a tank on my 2 door and at 300kms or so. I have yet to run a full tank though it.

Also from what I can see, I don't think theres a tune out for the new Penestar motor yet.

Side note I read a bit on this.. apparently programers don't void your warranty? If this is true.. I might get one. 500$ to save some fuel and get some more power might be worth it to me in the end. Hmmmm... any Jeep sales specialist want to chime in on this engine tuning buisness?

Re: What Type Of Fuel Do You Use?
 

I hope its just me, But i fine my 3.6 to be the slowest, NO balls anything i have ever driven...

I love my Jeep,, But no matter what i have to gear down for every freaking hill.

If this is the all new powerfull Pentistar, I can even think what was before this.

I Am assuming you have a auto transmission correct? I dont know much about the auto since i am using manual. But i know i got all the torque and power i need. These engines are all torque, so there low end is crazy. I sometimes chirp my tires coming out of 1st if i am trying to quickly jump into traffic. Maybe we should compair some time heh

Re: What Type Of Fuel Do You Use?
 

6spd man Trans. It has the 3.21 Gears.

My Jeep also Lags hard for the first few mins after start-up unless i warm in up for 5 to 10 mins.

Re: What Type Of Fuel Do You Use?
 

That's really weird.. we gotta get together and compare. I have the 3.73 Gears maybe that makes the big difference I don't know, was a 95$ option I heard it's a really good option when looking into bigger tires so i got it.

Re: What Type Of Fuel Do You Use?
 

Sorry if i missed it, But did you say yours was auto or 6spd?

Anytime you wanna hook up let me know, Beer and wings all the way.

Re: What Type Of Fuel Do You Use?
 

I'll drink root beer :) I love me some chicken wings for sure!

6 speed Manual, 2 door also so it's a little lighter then a 4 door. But your aprox 1 hour drive from me. I live in scarbrough, but i work out of the west end around Kipling area.

Re: What Type Of Fuel Do You Use?
 

id switch to the 373 or 411 if it made this slug come alive lol

Re: What Type Of Fuel Do You Use?
 

Well like I said we gotta compair, I am running the 3.73 gearing. But i heard it's pretty expensive to change the ratio for the rear, the physical gear itself isn't expensive but the labor is there sorta thing. I wanted the 4.11 gear but it was only available for the rubicon unfortunately.

Like i did say, if your planning to get larger tires your better off changing the gear anyway because it will slow you down even more when you get your bigger tires on.

Re: What Type Of Fuel Do You Use?
 

Thanks man, it's a Poison Spyder bumper.

As far as tuners I have a Diablo InTune and love it. Worth 500 for sure.

Re: What Type Of Fuel Do You Use?
 

But you have to wonder if it works for the 2013 Jeep Wrangler. It's a completely different motor then your 2011. I'd only do it if it gave me fuel mileage (significant) and didn't destroy my warranty.

It's a nice stinger, i want to get one for myself one of these years.

Re: What Type Of Fuel Do You Use?
 

If your are running a bigger tire with 3.21 on a 4dr! come on of course you're not going to be happy with the performance it is not set up for performance it's set up for fuel economy. That's like putting dirt bike wheels on a tour de France bicycle.
If you keep stock tires and switched gears it will come alive, to move up to 3.73 gears will cost big bucks though. Not just because of the gears and time but because the 3.21 carrier is different than the 3.73s carrier. So it would have to be changed to accommodate the new gears and that part is expansive. Of course you can get a TJ frt carrier from Yukon gears and have the work done somewhere other than a dealership. Going that route would most likely save money but put your power-train warranty in jeopardy. I don't recommend the latter, of course I'm biased being a dealer tech and specialing in 4wd systems
FYI
My brother's JK 2dr sport 6sp man with 3.73 is running 35's Duratrac and he has no issues with power.

Re: What Type Of Fuel Do You Use?
 

That makes me feel better, because I want to get upto 35 inch tires and was worried about having to swap out of my gear ratio to tow.

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If you had auto trans I would be telling you different, I've seen a few JK with auto trans running big heavy 35" tires come in with burnt tranies.

Lets be clear though, I did not write that you could run 35" and tow a something heavy.

Re: What Type Of Fuel Do You Use?
 

No but i should be fine, i am using a 6 speed and i wont be towing more then 1500lbs. If tanny overheating is an issue could always install a cooling unit.

Re: What Type Of Fuel Do You Use?
 

I was looking at my fuel economy pretty close now with the digital gauges, I look on the Jeep site it says 12.6L/100kms and 22MPG city, 9.3L/100kms and 30MPG Highway. Im scratching my head thinking really.. My dash is showing my average 12L/100kms (i probably still need to break my motor in some more it's at about 1700kms) But when i swap it to imperial its show 19.9MPG. Huh? So I do a conversion and sure enough american converts to 19.6MPG but thats not 22MPG.. Are they lying? Whats going on here! Conspiracy! Nope.. there displaying the british MPG which is around 23.5MPG.

So i don't know what these guys are trying to do, but it's very weird discovery. I run around 100km/h on the highway about 2000RPM or so, I find if I ride at 110km/h my eco goes from 11.8L/100km to 12.8L/100km.

If anyone knows when my engine break in should be complete let me know, or if I did something to mess it up. But everyone keeps telling me that I am still in my "engine break in" period, but the manual says 500kms is your engine break in period and I drove upto Midland on the highway for the day and did 500kms in 2 days of driving!

Re: What Type Of Fuel Do You Use?
 

after installing new tires( 33") and other mods, my fuel went berserk. Right now my dash is showing 16 L/100 km in the city or 14 mil/Gal. very bad....

Re: What Type Of Fuel Do You Use?
 

Don't go by the dash readout. It is averaged over the past 500klm unless you reset it. I use it only as an indicator to whether I'm getting on it too much.
Accurate mileage can only achieved by manual calculation. First use a speedo app or GPS to determine your true speed with the new tires. From that you can determine the % that your speedometer / Odometer is out.
For reference I get 17-18mpg (13-14L/100klm) combined, with 35" tires and a programer.

The reason for the discrepancy is they are converting to Imperial MPG (Imerial gallon is 4.54L) on the site but you dash gauge converts to American gallons (3.78L).

Re: What Type Of Fuel Do You Use?
 

i just use regular, not brand specific in my WJ and i seem to get about 475km to a tank running about 70% city driving. i have the 4.0L I-6 with the dana 30/35 axles, and i can tow my 12' single axle enclosed trailer (decked out for construction, holds all my tools, etc) with out much trouble. towing cuts my fuel economy by about 25% it seems. the only thing i have done to my motor so far is a K&N filter, and a 1" TBS. once i install my lift and my 32's should i be considering different gearing to keep everything copacetic?

Re: What Type Of Fuel Do You Use?
 

Today I fill up with Petro Canada 89 octane, just to see how it goes. No difference, actually I noticed somehow slower acceleration vs Regular 87 .

Re: What Type Of Fuel Do You Use?
 

I have a 2012 auto jkur 4:11's and stock on a 4000 km trip across the states i got anywhere from 11L/100km to 13L depending on the mountains to flat, or interstate 80 mph to 55 mph. When i put 33's on i actually get a little worse around town and a little better on the highway. Yes i said better, 100km cruising dropped my rpm 100-150 rpm with 33's and i get slightly better mileage. A 12 with auto and 411's is geared really low compared to anything earlier. If u change your tire size from stock to 33's your speedo will be off a little over 5%, this means your odometer will also be off 5%, which is a double whammy as far as mileage is concerned on your computer. As JTPhoto said, figure it out manually and get a AEV procal or a tuner to set your tire size correctly. In general american gas seems a little better then our Canadian stuff. I like to throw a tank of high test in every once in a while, it seems to get a little better mileage and work slightly better....but no where near worth the money to run all the time. Need a tuner to get the bang for your buck out of high grade. I like sunoco gas if i can get it, seems to be the best for me. Probably depends on the station,tanks and how fresh it is more then the brand.