Mileage

[1994xlt]

What size and brand tires?

Tires can cause a significant lose in gas mileage, not by size, but by weight.


I get 19mpg on the highway in my 04 with 5 speed and 3.0 but only 14-15mpg in town because of traffic.


i run michelin defenders in the stock size 235. I tried some cool lo9king tires that were 30s and my mileage dropped about 3 mpg. You didn't norice any driving change but wow, the gas mileage changed. I took them off after one tank of gas.

Stock size like you but has some cheap Lexiani tires that were on it when I got it

 

[lil_Blue_Ford]

Tires alone shouldn’t cause a 10 mpg condition unless you’re trying to turn huge tires with not enough gear.

I’m running 35x12.50-15 mud tires at 12 psi on my Choptop with a 4.0 OHV, FM-146, 1350m and 4.10 gears. With a bad computer and possibly bad O2 sensor I was getting 12 mpg. Fixing those jumped me to 15-18 mpg. Then I added an electric fan which may give me another slight bump.

 

[lil_Blue_Ford]

Also, I’ll throw this out there, the A4LD slushbox isn’t helping anything with mileage. My 92 jumped from 12 mpg to 14+ mpg by doing a tune-up, oxygen sensor, and some valve body work including a TransGo shift kit and adjusting the bands. I was going to investigate the computer condition when someone decided to hit me.

 

[gaz]

@1994xlt
Great, you have established that your power plant is the Federal version; you can expect 17 city/19 highway with the automatic in the optimum stock alignment

What is/are "you butchers"???

 

[1994xlt]

@1994xlt
Great, you have established that your power plant is the Federal version; you can expect 17 city/19 highway with the automatic in the optimum stock alignment

What is/are "you butchers"???

Typo

 

[1994xlt]

Okay so I guess with all that said we’re do I go next. Some have said check Ecm