[KKiowaTJ]

i had an out of town appt. today,i have the auto so it gets a little worse,i accelerate slow,didnt go over 65,and my gas light came on as i was on my way back into town at 170 miles on the trip gauge.i have the correct speedo gauge,i was a little disapointed,usually i get 200 miles out of a tank,but winter i always get worse mpg.but i would rather put up with 170 miles to a tank,than to drive a geo metro,if i ever bought one,id kick my own a$$,but everyone has their own opnion

[mrsnicks]

I replaced the stock air filter with the K & N air filter (not the cold air kit) and I get between .8 and 1.2 more mpg. I do highway miles so it may make a difference. and I've done the calculations before for 4 fill ups, and after every other fill up. Avg of 1 extra mpg for $35.00.

I have the 04 Wrangler Unlimited. (non-rubi)

Patrick

[bigwrm]

Originally Posted by XabuJr

Without affecting offroad performance, the best mod for gas mileage is the "Geo Metro mod". Find a Geo Metro, buy it, use it for any non-offroad driving and you will see a significant increase in the amount of time between fill-ups in the Jeep.

Ya but what about those that dont want to cut their balls off?

[hvac59]

Here is some tips for you,
Use the highest tire pressure you can tolerate.
Keep it as low of a lift as you can.(cut metal instead)
Narrow tires like 10.5's if you change out the stock ones
Get a "Scangauge" or simular and train your right foot.
Progressive shift like over the road truckers(use torque)
Utilize the vehicles MES(most efficiant speed) TJ = 48mph
Consider future mods with efficiancy in mind(warn hubs)

This is not advocating running out and spending a grand on a set of hubs that will save you 1+ mpg, but when the time comes for a repair or an upgrade take advantage of it. AEV"Highline's" are nice also and could save a little fuel instead of a six inch lift if you were going that way anyway. Like I said, you got what you got in respect to vehicle efficiancy and future mods do not have to half it if one is selective. Thhis would not comprimise offroad ability either. BTW, I bought a scangauge and checked my driving style. It sucked ! Progressive shifting and not warming the engine with a route to work that keeps me in the 45 mph range got me up to 18 mpg in a six inch lifted LJ. It's armored and loaded with gear on 35's also. Hope this helps. Although buying another vehicle is not out the window either,,,,,,,,,,,,,,,,,,I just got a 98 XJ 2.5 2wd 2dr 5 speed SE as an experiment. I THINK I CAN GET 30 MPG AND DARE A WEBTWIRP TO SAY I'VE BEEN DEMASCULATED. , and I'm still driving a Jeep.
hvac59

[Rivi]

i know a way of increasing your mileage but i'm not posting it here.It involves a very simple mod to the air intake system.I can probably get you 1-3 more mpg maybe more over time depending how you drive.You can pm for more info.

[igofshn]

Originally Posted by Rivi

i know a way of increasing your mileage but i'm not posting it here.It involves a very simple mod to the air intake system.I can probably get you 1-3 more mpg maybe more over time depending how you drive.You can pm for more info.

BS..........................

[ni0h]

There's one mod that enhances both mileage and offroad performance. A good tummy tuck with engine skid, smooth bottom as far as you can take it. I got a full MPG improvement from mine.
There's another one but it's not as clear cut. I got another MPG when I went from the stock 31" MTRs to 33x9.5. However, I gave back both MPG when I did the suspension lift. I would have loved to stay at that height, but was damaging sheet metal at full flex.
X2 on the scangauge, too.

[Tim70]

In my '01 SE, I've been able to eek out 20.1 MPG. 5 speed, using the shift light, and what not. And I still had a few gallons left when I filled up (the tank light had JUST come on). But usually, I get about 18-19 MPG.

Of course, it's basically a stock SE. Might go down when I put a set of 31's on it, and a RE BB.

[Tim70]

Originally Posted by Rivi

i know a way of increasing your mileage but i'm not posting it here.It involves a very simple mod to the air intake system.I can probably get you 1-3 more mpg maybe more over time depending how you drive.You can pm for more info.

BS +2.

If it was a real good mod, you would be passing the info on. What the heck, PM me the info and I'll give it a shot.

[Hunter9]

Originally Posted by Rivi

i know a way of increasing your mileage but i'm not posting it here.It involves a very simple mod to the air intake system.I can probably get you 1-3 more mpg maybe more over time depending how you drive.You can pm for more info.

Sounds like BS....but I bet you take paypal for the info you send??

[STW]

Originally Posted by hvac59

Here is some tips for you,
Use the highest tire pressure you can tolerate.
Keep it as low of a lift as you can.(cut metal instead)
Narrow tires like 10.5's if you change out the stock ones
Get a "Scangauge" or simular and train your right foot.
Progressive shift like over the road truckers(use torque)
Utilize the vehicles MES(most efficiant speed) TJ = 48mph
Consider future mods with efficiancy in mind(warn hubs)

All good ideas. Tell more about how 48 mph was established as the TJ's most efficient speed.

[Rivi]

the info is free,i just don't want to hear alot of bs posts like this.I'd rather just pass on the info privately.It not a big secret or anything.Just involves preheating the intake air to about 135 degrees and keeping it there all the time,trust me in cold weather this will boost mileage quite a bit.I learned this little trick from a engineering friend of mine,they use this trick in big boilers.Instead of tossing all the stack exhaust out they reclaim some of it and preheat the intake air to about 135 f. this boosts efficency quite a bit.If you look at any late 80's gm car-truck with a TBI they use this same deal.I wouldn't run it in the summer months,but in the winter i KNOW it will boost mileage at least 1-3 mpg because i use it in mine.

LET THE SHEET STORM BEGIN.









p.s. this is why i didn't want to post it here.

[Red_]

Originally Posted by Rivi

the info is free,i just don't want to hear alot of bs posts like this.I'd rather just pass on the info privately.It not a big secret or anything.Just involves preheating the intake air to about 135 degrees and keeping it there all the time,trust me in cold weather this will boost mileage quite a bit.I learned this little trick from a engineering friend of mine,they use this trick in big boilers.Instead of tossing all the stack exhaust out they reclaim some of it and preheat the intake air to about 135 f. this boosts efficency quite a bit.If you look at any late 80's gm car-truck with a TBI they use this same deal.I wouldn't run it in the summer months,but in the winter i KNOW it will boost mileage at least 1-3 mpg because i use it in mine.

LET THE SHEET STORM BEGIN.









p.s. this is why i didn't want to post it here.

It works. The science behind it is that for you to keep your 14.7:1 stoich burn you require a certain amount of fuel and air. If the air is cold and dense, the more fuel is required to reach 14.7:1, if the air is hot, you have less air and requires less fuel. Catch is you are also making less power then you would be normally.

[Rivi]

no the power is the same because the design allows full cold air flow at low manifold vacuum.Part throttle response is also better.

[Red_]

Originally Posted by Rivi

no the power is the same because the design allows full cold air flow at low manifold vacuum.Part throttle response is also better.

I meant the basic concept of hot vs cold air. Using the dual intake setup is the best way to implement this.