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Old 05-18-2011, 01:31 PM   #31
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Originally Posted by Wallygator View Post
I guess that depends on what part of the country you are from. Up here we have extremely dirty fuel and getting the injectors cleaned is recomended by most shops in the area and one of the first things on the list after plugs wires etc. Almost all the shops around here do injector cleaning and recomend using a bottle in the tank every third or 4th tank of fuel. I got mine done after 100 thou and it ran noticably better. Slight improvement on the mileage too.
And you really trust these shops, they will try and sell you everything under the sun, and people fall for it all the time.

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Old 05-18-2011, 01:32 PM   #32
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It is a huge money maker for the dealers. Minimal cost on their end.

I am curious though why the fuel in BC is extremely dirty it all comes from the same refineries. Is it the actually supply system that is tainted?
It also depends on the refinery and the oil type used to make the gas.

If the oil is a "heavy sour" crude like what we get from our buddy in Venezuela, it has a higher sulfur content, is "dirtier" overall, and requires a lot more energy to refine into gasoline. It may burn less efficiently, I'm not sure.

"Light sweet" crude from the middle east is what is normally refined and supplied to the northeast/mid-atlantic states.

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Old 05-18-2011, 01:35 PM   #33
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We are going through the windy season here in Vegas, my gas mileage drops 2 mpg, Those MGP test are done in no weather conditions, Wind, Rain, Snow.. All those effect your MPG... If you get 14 or more be happy.
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Old 05-18-2011, 01:36 PM   #34
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If you have a Jeep, your gonna burn gas. That's just the way it works.
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Old 05-18-2011, 01:55 PM   #35
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Buy a cheap but dependable car, truck, or minivan. You may be able to find something for $500 to $1000. If you aren't vain, how it looks shouldn't matter, how it runs and how much gas you spend is.

I run a ford Ranger. It cost me $25 to fill it up. I can drive it all week back and forth to work. That's OVER two hundred miles in a week!
Weekend, I can drive my Jeep. Or, I can split the difference. The ranger is ugly as hell, some type of gold/brown. It's got dents all around it, no A/C, but I got it for a two hundred dollars! The insurance is practically nothing!

I found the ugliest thing, and as long as it runs and get's good gas mileage, that's what matters. the money you throw away trying to save money to drive your Jeep cheaply, you could just buy a second vehicle.
State auctions are gold minds for such vehicles. you can find anything online. Most of the time, these vehicles are beat up, but ....they are maintained regularly. you can go see it first, hear it start, see it run, maybe test drive it...maybe, depends on that part.

I also own a minivan, you can get them for a few thousand dollars, it runs circles around anything I've ever owned when it comes to gas mileage.
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Old 05-18-2011, 03:14 PM   #36
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I think just about everything has been covered here. Proper air pressure, tune up with clean filters, etc. But I truly think the large nose cone is a great idea.
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Old 05-18-2011, 03:16 PM   #37
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Quote:
Originally Posted by VegasJeeper2002

And you really trust these shops, they will try and sell you everything under the sun, and people fall for it all the time.
My point with the $$$$, thanks
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Old 05-18-2011, 03:23 PM   #38
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But ok, on topic playing along I havn't seen anyone mention that low tire pressures can kill your mileage. Check your tires first, even a couple pounds low on one tire has a really bad efect on MPG. Also, pick your "high rpm" limit such as 2500 and under no circumstances are you to run higher than that point. Do it for a week, you'll save $$$. Take offs are a bit slower, but it truely does save MPGs. As well, jack it up and ensure each wheel spins freely. Bad wheel bearings and/or brakes dragging will suck up the gas at a rediculous rate to.
That's exactly what I do. I got 18 mpgs from my 4.0L from my last tank.

I'll go weeks without filling up. I live in Cleveland, and generally I ride my bike everywhere.
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Old 05-18-2011, 04:05 PM   #39
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Where the hell is the thread poster? Trying to help here, and of coarse a subject on mpg always is fun. We (well some) of us are trying to help but, no feedback
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Old 05-18-2011, 06:24 PM   #40
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My point with the $$$$, thanks
I actually have had the work done to my own vehicle and have noticed the difference. To spend 75 buck to have something done as part of regular maintenance every few years is nothing with the price of gas nowadays. I have had it done to most of my cars and trucks over the years and it DOES make a difference.
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Old 05-18-2011, 07:41 PM   #41
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Originally Posted by Wallygator

I actually have had the work done to my own vehicle and have noticed the difference. To spend 75 buck to have something done as part of regular maintenance every few years is nothing with the price of gas nowadays. I have had it done to most of my cars and trucks over the years and it DOES make a difference.
To pay a shop to do a what? fuel system cleaning? That's free money to them and is something that really does not need to be done these days. I'll add a bottle of Techron every oil change and call it a day.
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Old 05-18-2011, 10:26 PM   #42
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That may work fine in some areas but around here we have really bad fuel. Most people arre lucky if they get more than 5-6 years out of thier fuel pumps. And it really is more involved than just adding a bottle of cleaner. altho that is great maintenance in between. But back to the original topic, Where has the OP gone and what has he tried so far?
All sorts of ideas on here and nothing back from him
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Old 05-18-2011, 10:32 PM   #43
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So you are saying that Shell or Chevron or other major gas companies distribute gas differently depending on where you live. Then the gas companies must really hate you and or the area in which you live. They give the Southern states the good fuel and you Northeners the crappy fuel?
I think it has to do with the refinerys here in canada and maybe the way its stored at the refineries. Not that we have much for refineries herre in BC and none in the interior. Mostly storage facilitys and most of them are as old as I am. Could be that the tanks are taking on more shit from the runoff. Remember we still have snow in the hills here and have a long winter with lots of salt and crud getting into the stations underground tanks.
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Old 05-18-2011, 10:34 PM   #44
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Quote:
Originally Posted by Wallygator
That may work fine in some areas but around here we have really bad fuel. Most people arre lucky if they get more than 5-6 years out of thier fuel pumps. And it really is more involved than just adding a bottle of cleaner. altho that is great maintenance in between. But back to the original topic, Where has the OP gone and what has he tried so far?
All sorts of ideas on here and nothing back from him
Rofl... that's what I'm saying, He sh*t and split lol.

Where u from that your gas Is so bad? I don't see profiles unless I'm logged in not on my phone.

Edit: Canada NM
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Old 05-18-2011, 11:53 PM   #45
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Quote:
Originally Posted by LaTuFu

It also depends on the refinery and the oil type used to make the gas.

If the oil is a "heavy sour" crude like what we get from our buddy in Venezuela, it has a higher sulfur content, is "dirtier" overall, and requires a lot more energy to refine into gasoline. It may burn less efficiently, I'm not sure.

"Light sweet" crude from the middle east is what is normally refined and supplied to the northeast/mid-atlantic states.
Idk about gasoline but in diesel the higher the sulfur count the dirtier it may be but the better it will run. The newly regulated on-road diesel has 15 PPM of sulfur while off-road diesel has 500 PPM of sulfur. You run a tank of on-road through and get 18 MPG then run a tank of off-road through and get 24 MPG and it runs like a scalded dog. I know it's just like comparing apples and oranges but it's just my way of contributing to this thread in no way whatsoever...
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Old 05-19-2011, 01:08 AM   #46
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Rofl... that's what I'm saying, He sh*t and split lol.

Where u from that your gas Is so bad? I don't see profiles unless I'm logged in not on my phone.

Edit: Canada NM
The not so sunny Okanagan.BC Canada. worst gas I've seen anywhere. And I move around a lot. Used to work at a gas station and it was normal to have 6-8 inches of water in the storage tanks. Trust me around here gettin the injectors doen every 50-60 thousand miles makes a huge difference. But yeah WHERE DID THE OP GO????
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Old 05-19-2011, 04:54 AM   #47
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Sun? Whats that? Lol.
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Old 05-19-2011, 07:42 AM   #48
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I'm with you Wally, it had made a signifficant difference for me, plus it is direct unlike the techron being added to the gas. and its worth it to try because it cant be more than 50-75 to have done even at a shop.
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Old 05-19-2011, 07:59 AM   #49
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Sun? Whats that? Lol.
I know... I work next to a wall of windows and I don't think I've seen the sun since saturday... Its really affecting my work ethic...
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Old 05-19-2011, 09:00 AM   #50
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I know... I work next to a wall of windows and I don't think I've seen the sun since saturday... Its really affecting my work ethic...
Feel ya... Sucks.
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Old 02-21-2012, 10:00 PM   #51
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Wow. Why all of the obvious haters? It's a valid question and like someone else said, maybe 15 can be improved on? Afterall, didn't the sticker promise 19 HWY?

I recently purchased my 05 Rubi with 53K miles. On the trip home, I got real close to 15 with slow takeoffs, milking it into 6th as quickly as possible, and using as low RPM as possible. I was very disappointed.

With today's modern technology, it would seem to me that even these 50's tech in-line 6 cyl engines should be doing better.

As far as the "brick in the wind" comments? Get real. There are a lot of high profile, flat faced vehicles doing better. I used to drive a Dodge Ram 2500 with the 360 that would get 14.5 MPG. I had a Chevy Silverado that I could get 20 MPG with (and the Chevy V8 350 originated in the late 60's). So, if Chrysler couldn't have squeezed a few more MPG out of this 4.0L, they weren't trying or didn't care, IMHO.

Funny thing is, no one else ever had a solution either.

A truck this light, this small has no excuse for it's extremely low mileage.

As a counter point though, my Grand Cherokee (99 model) had the same engine and I could usually get 18-20.
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Old 02-22-2012, 08:34 AM   #52
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I want to know? If i put a small fuel injected v8 in my Jeep can i get 15mpg or better?
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Old 02-22-2012, 09:32 AM   #53
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As a counter point though, my Grand Cherokee (99 model) had the same engine and I could usually get 18-20.
That's a lighter and far more aerodynamic vehicle.

Many people seem to think the steel frame and steel tub non-unibody Wrangler is a lightweight vehicle. It's not, far from it.
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Old 02-22-2012, 10:47 AM   #54
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Funny thing is, no one else ever had a solution either.
so if Chrysler wasn't trying to improve mileage on the 4.0L, what were they doing? After all, the better mileage per vehicle they get, the better their CAFE score, and the government is happy. It's to their advantage to improve mileage as much as possible while still passing emissions.

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A truck this light, this small has no excuse for it's extremely low mileage.
just how lightweight do you think your 05 Rubi is?

bone stock it's 3800lbs, with a drag coefficient is 0.58/0.55 (soft top/hard top).

The WJ weighs about the same, but has a 0.45 drag coefficient.

To put that in perspective, the average modern semi-truck has a drag coefficient of about ~0.6-0.7, and Corvette's are around ~0.30.

So, the Wrangler has a drag coefficient almost equal to an 18-wheeler. Think about that as a surface area problem when going over 55mph.
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Old 02-22-2012, 11:24 AM   #55
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I want to know? If i put a small fuel injected v8 in my Jeep can i get 15mpg or better?

i'm pretty sure Corvette V8s get much better gas mileage than the Jeep 4.0L.
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Old 02-22-2012, 11:30 AM   #56
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i'm pretty sure Corvette V8s get much better gas mileage than the Jeep 4.0L.
Not in a Wrangler they won't
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Old 02-22-2012, 11:49 AM   #57
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i just wanna be included in this thread and say what everyone else has already said lol...

walk, bus, bike, or buy another vehicle...thats about it!
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Old 02-23-2012, 07:49 AM   #58
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Well a F150 can get 20+ MPG can i get 15mpg with a small fuel injection v8?
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Old 02-23-2012, 08:03 AM   #59
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Experiment time. Pull up next to any modern vehicle, other than another wrangler. Look at the angle on their windshield. Now look at yours. See the difference? Now, go out driving. Roll/unzip your window and stick your hand out, palm facing forward. Now, angle the top edge of your hand rearward slightly. Feel the difference? That difference is what makes us have crappy mileage.

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