i have a RC 4.5 lift and stock tires for now and i went from 16 mpg to 13.5.....

 

Damn that sucks! Well I'm not extremly worried but if I can get better mpg's why not...so I'm going to try all the reccomendations to see what happens.

What size is the gas tank? & How much fuel is in the jeep (including tank, and fuel lines) once the warning light comes on?

 

Well i got some time and changed the fuel filter and added Lucas fuel system cleaner. I was going to get a before and after reading but I dint feel like wasting fuel lol. The filter seemed to be clogged the weight difference between the old and new one was very noticeable. Stay Tuned!

 

Our XJs came from the factory with a 20 gallon tank. But to answer your question about how much is left when the warning light comes on, I'm not really sure. I usually fill up right when the fuel light comes on and it takes right around 14 gallons

 

did you check your tps? it might be bad,if you hav the aw4 trans,the tps helps put it in overdrive to help save some gas on the highway. not to mention the coolant temp. sensor and map sensor,o2 sensor,iac sensor,mat sensor. i would check those before changing gears.

 

If you wanna spend a few hundred dollars to possibly not even help the problem...

Orrrr you could buy gears for basically that same price and know for sure that you will get some more MPGs

 

How about a hairline crack where it's not really seperated?

 

Say what now??

 

Get used 2 it homie you have a box on wheels with 33's and stock gears if ya want fuel mileage buy a prius

 

hes saying take it out of overdrive

 

Why would you do that on the highway?

 

I'm not an eggspert but in overdrive on stock gears with tires like that I highly doubt the transmission will lock the torque converter. You're going to be dumping a lot of gas into the engine and the transmission will be operating at a pretty low efficiency. If you can leave it in a lower gear and get the engine spinning closer to its torque peak, it's possible you could have the torque converter lock and go easy on the throttle. Maybe a Type R sticker or two.

At least that's how I imagine it works lol

 

bighouts i bet they have good deals on type r stickers at ur work haha

 

They do....the more gnarly the sticker is the more HP gain you get...I prefer the flaming skull with an american flag thrown in there.

 

does it have chrome on it?