99 xj,4.o,456 gears,33rs

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trailrunner

NAXJA Forum User

Location

coloradosprings,colorado

• Apr 15, 2007

• #1

what kind of fuel milage should you get?

 

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codeman5

NAXJA Forum User

Location

dixon

• Apr 15, 2007

• #2

I have 410 and 32 I get 14.

 

uncc civilengineer

NAXJA Forum User

Location

Winston Salem, NC

• Apr 16, 2007

• #3

Auto or Manual?

Im 98 4.0 Auto 4.56's and 285x75x16's and average about 18.5 with a 60/40 highway/city driving.... All highway and I get close to 20 or so...


EDIT> but I also live where for the most part, it's flat....

 

ZachMan

NAXJA Forum User

NAXJA Memorial Lifetime Member

Location

Birmingham, AL

• Apr 16, 2007

• #4

I got that exact setup 99 4.0/aw4/4.56s/33s and get 15-18mpg depending on city or hwy and how fast.

 

mattyj

NAXJA Forum User

Location

Corona CA

• Apr 16, 2007

• #5

never any better than 14 - 15mpg. Wish i could find out how some of you guys get 18 - 20.
I definatelty dont hammer it either. fwy cruise speed about 70 - 75mph.
Have good tires, pressures set, clean air filter bla bla.........

 

CDX74

NAXJA Forum User

Location

TX

• Apr 16, 2007

• #6

ZachMan said:

I got that exact setup 99 4.0/aw4/4.56s/33s and get 15-18mpg depending on city or hwy and how fast.

Click to expand...

wow, that's pretty good, i have the same setup and i'm pretty sure i don't get anywhere near that...

 

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fuzzydog

NAXJA Forum User

Location

BC Canada

• Apr 16, 2007

• #7

mattyj said:

never any better than 14 - 15mpg. Wish i could find out how some of you guys get 18 - 20.
I definatelty dont hammer it either. fwy cruise speed about 70 - 75mph.
Have good tires, pressures set, clean air filter bla bla.........

Click to expand...

cruising at 70-75 mph is gonna suck some juice.
The faster you go, the more power it takes to make you go faster - ie. it takes more power to go from 65 to 70 than it does from 50 to 55.

 

uncc civilengineer

NAXJA Forum User

Location

Winston Salem, NC

• Apr 16, 2007

• #8

Yep, I generally cruise on the highway between 65-70.. I have a K&N but it's probably not helping much. My jeep also has 83k on the clock and gets regular maintenance. I think with some AT's I could get into the 20 mpg range...

 

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PolishX

NAXJA Forum User

Location

Eagle Riverr Alaska

• Apr 16, 2007

• #9

I go 63 on the highway according to mr GPS and have a 98 with same set up but mt 33's are BFG and I get 14 MPG- 15 MPG

 

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CartsXJ

NAXJA Forum User

Location

Glenville, NY

• Apr 16, 2007

• #10

I used to have that set-up, averaged 17-18 in town and 20+ on the highway, I was also spinnin' 2900 rpms at 75mph+, the 4.0L loves the high rpms for cruisin'. Though they did change the set-up in 99 compared to my 98 so who knows. But I bet you'll get high teens out of that set-up.

 

Rockken

NAXJA Member # 1674

Location

Westminster, Co.

• Apr 16, 2007

• #11

I have a stock 99 with a manual and 115k miles. Very little highway and I get around 19mpg. Trailrunner, remember we live in Colorado, we are going to get worse milage because of the altitude. Up north where I live, there are alot of hills as well.

 

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PolishX

NAXJA Forum User

Location

Eagle Riverr Alaska

• Apr 16, 2007

• #12

only had my gears for 2 tanks of gas and my speedo gear is off going on GPS only I need to get a speedo gear soon

 

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trailrunner

NAXJA Forum User

Location

coloradosprings,colorado

• Apr 17, 2007

• #13

well l get around 12.5 in the city,better on the interstate,but it still sucks,would upgrade to bigger exhust an that throttle body upgrade make any difference?

 

ZachMan

NAXJA Forum User

NAXJA Memorial Lifetime Member

Location

Birmingham, AL

• Apr 17, 2007

• #14

About to go back to 35s so my 15-18mpg is going to be like 12-16mpg.