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Old 01-16-2014, 05:00 PM   #1
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Gas mileage

Now i know im driving a wrangler... Its a giant toaster with an inline 6. As far as gas mileage is concerned im geting not as good of mileage as id like... I was wondering if any of u have put like an awesome air intake that u swear by.. My friend got a spectre cold air intake and he got his mileage boosted by 5 mpg... Just any little thing you guys could think of would help

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Old 01-16-2014, 05:06 PM   #2
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Mostly it's the way you drive or how fast. I can get 20mpg with all highway driving and keeping it at or around 60. In the city if I'm easy on it around 16mpg other then that 14mpg isn't uncommon. Also check your air filter throw in some injector cleaner and check your plugs and stuff all will help

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Old 01-16-2014, 05:14 PM   #3
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He didn't get 5 mpg from an air intake.....exhaust + in take might get you 1-2 the most. How you drive and the condition of the vehicle is more important.
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Old 01-16-2014, 05:56 PM   #4
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zero chance he got 5mpg out of a spectre intake on his wrangler...zero.

As the others mentioned, its how you drive that gets you the mileage. Expect 15ish.
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Old 01-16-2014, 06:01 PM   #5
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Maybe .5 mpg increase? or he/she measured the mpg traveling down hill.
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Old 01-16-2014, 07:25 PM   #6
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He has been known to mod his jeep then tell me five weeks later so he could have done something majorly different... Bu has anyone used a spectre intake and if so which one?
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Old 01-16-2014, 08:00 PM   #7
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5mpg is a 33% increase...i doubt theres any combination of mods you can do to your jeep in order to achieve over 20mpg with a 6 cyl unless its lowered, small tires, no weight in it, and is manual.

I get 18 avg with mine on 35's but also have a manual 4 cyl geared to 4.88 and live above 5000 feet...
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Old 01-16-2014, 08:01 PM   #8
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He has been known to mod his jeep then tell me five weeks later so he could have done something majorly different... Bu has anyone used a spectre intake and if so which one?
There are many brands of CAI you can get, and they all have essentially the same design. The difference between 2 aftermarket intakes will be so insignificant it doesn't even matter. Now whether an aftermarket intake performs better than a stock intake, I can't say because I haven't installed mine yet (I have a Volant CAI).

If you really want a CAI, I have a brand new one that I can part with cheaper than any other CAI you can find (it isn't a Volant, I believe its an Edge).
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Old 01-16-2014, 08:17 PM   #9
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The two most important things for mpg are driving habbits and o2 sensors.
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Old 01-17-2014, 07:30 AM   #10
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Gas mpg

My 2012 jeep was getting 21 to 22 mpg but now it has dropped to just 19 what happen
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Old 01-17-2014, 07:38 AM   #11
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What kind of MPG do you want to see out of it? But to increase MPG like Lando said, driving habits. 5mpg out of any bolt ons in a Jeep is not realistic..
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Old 01-17-2014, 08:36 AM   #12
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I got my first one this summer - '97 Sport, 5 spd, 6-cyl, 3.07 and it had the stock 225's on it (no lift). For the first week with the 225's, I averaged around 21 mpg. I put 31's on and it dropped to ~17/18 BUT I haven't changed the speedo gear nor did I adjust my calculations.

I still average between 16 and 18 mpg. If I drive crazy (i.e. like it's the Integra I had before) I'm looking at closer to 15 mpg. I also rarely have a top and doors on (almost not at all this summer and as little as I can get away with this winter). I've noticed a (slight) improvement when I have the top and doors on.

Aside from being an I6, you haven't really given details about your jeep - tranny, gearing, lift, tires, etc. All play factors in your mileage but just as important are driving habits. I'm still - after 6+ months - learning the best way to drive it. An easy touch is your best friend. Chips, add-ons, etc. for a Jeep simply aren't going to have any effect worth their time or money. Your best "tool" for getting better mileage is free - drive better.
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Old 01-17-2014, 09:03 AM   #13
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Good spark plugs, wires, brass distributor cap/rotor, clean air filter the usual tune up stuff. Also properly air up your tires and easy on the gas pedal. I get 20mpg on a 97 4.0 with a 4" lift and 33's. Why? Because my jeep runs as good or better than new. I don't abuse it and I shift gears appropriately. IMO stomping on the gas is good MPG worst enemy.
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Old 01-17-2014, 02:09 PM   #14
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bruffnut, I tried to send you a PM but your inbox is full.
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Old 01-17-2014, 02:27 PM   #15
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I have a 2013 JK. Just got it two months ago. I'm averaging about 21 -22 mpg except during the recent arctic blast we had. That week I only averaged 19 mpg. About two thirds of my driving is on the hwy and I keep it around 60 mph. Also watch the "eco" display like a hawk.
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Old 01-20-2014, 03:49 PM   #16
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I have a 2013 JK. Just got it two months ago. I'm averaging about 21 -22 mpg except during the recent arctic blast we had. That week I only averaged 19 mpg. About two thirds of my driving is on the hwy and I keep it around 60 mph. Also watch the "eco" display like a hawk.
Just making sure here... But my eco display is the little "house" (arrow) in my upper right hand corner right??
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Old 01-20-2014, 04:10 PM   #17
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you dont have an eco display...you drive a jeep, i mean a tj...

that little "arrow" is a useless light that tries to tell you when to shift.
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Old 01-20-2014, 04:52 PM   #18
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Buy an Bluetooth OBDII reader and read the live MPG from the computer with your phone. You will learn exactly how your driving habits effect your fuel economy.

The shift arrow on the dashboard is nowhere near useful.
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Old 01-20-2014, 05:12 PM   #19
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Buy an Bluetooth OBDII reader and read the live MPG from the computer with your phone. You will learn exactly how your driving habits effect your fuel economy.

The shift arrow on the dashboard is nowhere near useful.
I just got a reader and torque pro, I really like all the things you can monitor including instant and average mpg.
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Old 01-20-2014, 05:28 PM   #20
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My 97 TJ gets between 10 and 11 mpg. Just bought it a couple weeks ago it has a 2.5 and a manual tranny with 197000 miles. Just put exhaust system on it( new cat and all) an getting ready to do plugs and wires. Hoping something will help. Check engine light comes on and when I hooked a reader up it says bank 1. Autozone guy said it was o2 sensor before cat. Could that be the problem with my gas mileage?
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Old 01-20-2014, 06:26 PM   #21
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My 97 TJ gets between 10 and 11 mpg. Just bought it a couple weeks ago it has a 2.5 and a manual tranny with 197000 miles. Just put exhaust system on it( new cat and all) an getting ready to do plugs and wires. Hoping something will help. Check engine light comes on and when I hooked a reader up it says bank 1. Autozone guy said it was o2 sensor before cat. Could that be the problem with my gas mileage?
.

It could be and most likely is.
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Old 01-21-2014, 08:01 AM   #22
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My 97 TJ gets between 10 and 11 mpg. Just bought it a couple weeks ago it has a 2.5 and a manual tranny with 197000 miles. Just put exhaust system on it( new cat and all) an getting ready to do plugs and wires. Hoping something will help. Check engine light comes on and when I hooked a reader up it says bank 1. Autozone guy said it was o2 sensor before cat. Could that be the problem with my gas mileage?
If the O2 sensor is bad, that will definitely hurt your gas mileage, especially if it has almost 200k miles on it and they have never been changed. My suggestion is, if you're gunna replace one, you might was well replace all 4.

A couple cans of Seafoam might help as well. Also I bought a bottle of Heet, which you add to your gas line to remove any water. It is less than $2, and I swear it increased my gas mileage by about 1 mpg, but I have only been on one long trip since I used it. It has helped cold starting though.
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Old 01-21-2014, 09:08 AM   #23
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... if you're gunna replace one, you might was well replace all 4...
My 2003 has 4 O2 sensors, but I think his 1997 has only 2.
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Old 01-21-2014, 09:19 AM   #24
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My 2003 has 4 O2 sensors, but I think his 1997 has only 2.
I did not know that, but I guess that is better for him since he only has to buy 2 instead of 4.
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Old 01-21-2014, 10:31 AM   #25
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Yea there's two. One on front pipe and one after cat. I just bought the jeep about 2 or 3 weeks ago. Dealer replace sensors ( they look clean and new) but maybe used Bosch sensors. Gonna try and put NTK sensors on see if that works. If not then maybe crack in the manifold? I read that a crack in the manifold will suck o2 in and trip the sensor.

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