Gas mileage

Sounds about right.

My I6 ZJ gets 15-20 depending on how I baby it and you have about the same brick-on-wheels aerodynamics.

I did find that STP Gas Treatment helps a bit. Ran it to help clean out injectors/etc and got a few extra mpg on the highway.

Chevron Techron is also a very good additive to clean out injectors and give a bit of a mpg bonus.

Of course you have to figure out the cost benefit.

As much as I like my '97 TJ SE, the 4 banger auto gets maybe 13 MPG. I have 235/75R15 tires on it.

Have you ever replaced the O2 sensor? They do drift over time and cause the engine to run rich. Thing is that small drift doesn't cause a fault and you can only actually see it with a scope or the high buck scantool.

I also ran across the concept that the battery can be a MPG drain if it can't hold a proper charge. Makes sense if you think about the alternator drag trying to maintain a weak battery.

with gas prices the way they are, every fraction helps. :/

Sounds about right. Mine gets 15-16 MPG with 31s and the hardtop on.

I'm getting 23-25 but I live in the mountains and hardly ever go over 60 except when going downhill. I also have a cat-back, electric radiator fan and Turbo City Rock-It! air tube. I believe the speed thing is key. 55-60 mph, max. Well sometimes I can't help myself. One time I had it going 85 and passed a CJ-7. If you really want better mileage put 205/75R15 tires on it, or put low profile tires on stock rims. Even with 4.11 gears I think my

There are some performance goodies for the 2.5 litre engine, and in my experience they help mileage a lot more than power, but that's what you want now, right? A cat-back is probably a good start.

Cheers,

Earle

Thanks for your responses... I think I didn't make myself clear. My Cherokee has the 4.0 liter 6cyl. I was hopeing a 4cyl Wrangler got better mileage so I would have a good excuse to get me one. You would think it would? Maybe cause it takes more power to run? The 4 cyl has to work harder than the 6 would? Still doesn't seam right . What is the purpose of making a 4 cyl then? ..Oh, yeah, money....

Off road they do really well stock, because of the 4.11 gears. I am getting

You are not going to realize a fuel savings going from a Cherokee to a Wrangler, because let's face it the aerodynamics of the Wrangler are even worse than the Cherokee. The purpose of making a 4 cylinder was to make the vehicle cheaper and to pass some of that savings on to the customer. I had a neighbor once with a two door four cylinder Cherokee. Now that's a pretty good combination. But you can't take the top off.

Cheers,

Earle

Honestly, I don't know why every Wrangler didn't come with the 4.0L. Wranglers are aerodynamic bricks, and from what I've read here the 4.0 often gets *better* mileage than the 2.5 because it doesn't have to work as hard pushing it through the air at interstate speeds.

On mine, I have to downshift out of 5th for even slight hills on the interstate. It's less of a problem since I installed a 4.0 throttle body, and I did see a slight 1-2 MPG increase, but it's still no 4.0.