Gonna Buy a DD

S

SharkXJ

NAXJA Member #1177
Location
San Jose, CA
Hey ya'all....

My 80 mile round trip communte to Brisbane is workin' my heep. I'm getting about 17 mpg which isn't bad considering 35's and all of the weight.

I want to get another XJ and keep it stock BUT I was wondering what I could do to get around 20 to 22 mpg out of one? I know, I know - I should get a Japanese car but I know XJ's and I am more comfortable buying one with higher mileage than I am a foreign car.

Here's what i'm thinking - Switch to a 15x8 rim and rum a slightly lower profile, light truck tire. Then throw on a cold air intake, and a cat back sysem of some sort. then of course do a total fuel system clean. With that I am thinking I could get about 8 to 13 more HP which in turn could get the mpg up a little.

How about plugs and a coil pack? Is there an after market coil pack to increase effeciency?

Thanks a bunch!!! I posted this in the Tech section as well but I trust the folks I know here (well - maybe I shouldn't - LOL).

~Mark
 
Mark,

I once had a stock 88 w/the pugeot 5-spd that delivered 22mpg highway. That was commuting from SF to Alameda roundtrip of 36 miles. Runnning 101 back & forth you should be able to expect that kind of mpg.

Petaluma to SF has too many hills w/ stop -n-go to even attempt driving my MJ w/ the 5-spd.
 
Thanks man.... I'm realistic with the MPG I might get. I would buy a little car but I just feel more comfortable with something I know a lot about and I know for a fact parts are relatively inexpensive.
 
My stock 1993 five speed delivers 20 MPG on my commute(32 miles round trip 95% hi-way).
Buy good gas with 10% or less ethanol. When I get the cheap shit(AARCO) the mileage drops to around 18 MPG.
Throw intakes and exhausts at it all you want but don't expect to get your money back with better MPGs. Just do it 'cause you want to.
 
Cool Jes - Thanks for the input (I appreciate it).

Like I said above, i'm just comfortable buying an older Jeep vs. an older smaller car.

I've seen a few fairly decent XJ's out there so we shall see.

~Mark
 
look for a OBDII (96+) 2wd, 5spd, and I guess either the 4 or 6 cyl would be fine:
http://www.fueleconomy.gov/feg/bymake/Jeep1996.shtml.

I bet you if you did an intake and exhaust on a stock 6cyl, 2wd, 5spd, light rims, street tires, keep the weight down, youd get over 22mpg. I had a buddy before he built up his 4x4 5spd 4.0 that was getting like 21mpg with 31s on stock rims, he has over 400,000 miles on the stock motor too . pretty crazy. i think he changed the clutch once. the oil a every 3k . still going strong.




Personally youd be better off getting a little honda civic, accord, camry, corolla, something like that, getting 30+ MPG, reliable, cheap, easy for long drives.

your second XJ will become a second money pit, no matter how hard you try, well at least in my experience, when I had 3 jeeps i had 3 money pits,then 2 money pits, now only one money pit and a DD little honda thing. the honda thing pays for itself in gas savings and lack of constantly working on it.
 
qesejyva.jpg


Ill be gettin a dd to fml
 
Last edited:
Jon, I think that last one would be the best bang for the buck daily driver. Must bea an easy 30 mpg.

This gas it killing me too. Id look into getting a saturn sl series. They get KILLER MPG's. My dad's gets an easy 35 MPG on the highway. You can find them all day for under $1500, and parts are plentiful in the junkyards.
 
My 2-cents here, but I would just get a old Honda or Toyota 4-banger. They are easy enough to work on, parts are cheap enough, and you could pull 30+ mpg.

But, if you stick with an XJ, this is what I've experienced.

1994, SE (no options except AC and cruise), 5 spd, 4.0, 4x4. Would regularly get 17mpg with around town commuting and 20+ on the highway. Put on a 3" lift and 30x9.5x15's street tires and it didn't really change, but the power kinda sucked compared to stock tires.

1993 Country (fully loaded with power everything and leather), AW4, 4.0, 4x4. Regularly got 15mpg with around town commuting and struggled to get above 17mpg on the highway. Full tune up didn't change anything. This XJ only had 60k miles on it and ran great. Added a K&N intake (scored at the junkyard) and Dynomax catback exhaust - still no improvement. 2.5" lift and 31" tires and I was down to 14mpg regularly and could just about get 17mpg on the hwy.

So, if you get an XJ for mileage, I would suggest a later model 5 speed, 2wd with small street tires. Lowering it and adding an air dam up front might yield some good results, too. But that is just conjecture on my part. I still don't think you'll get more than low 20's unless you get a 4 cylinder.
 
az - I hear ya man. I am open to one of the two as well. It's just a comfort thing as far as I already know how to do quite a bit to an XJ and I have the tools as well.

If I get an XJ I don't "plan" on lifting it :-) A light weight tire and so on but that's it.

I am concerned about MPG but at the same time I really just want to get out of driving my current rig every day.


Thanks everyone for the input - I REALLY appreciate all of it.

Mark
 
Auto? If you're looking for MPG's, id look for one with a 5 speed. I got 18-19 MPG city in mine when it was stock. And I drove like, well... a high schooler.
 
assuming 19200=(80*5*4*12) miles a year (for commute only)

MPG Gallons price Total $
4.0 auto stock 19 1011 5 5053
your built rig(CURRENT) 16 1200 5 6000
saturn, honda, yota car 35 549 5 2743
4 cyl 5 spd XJ all stock 25 768 5 3840

you can see the savings over the 4.0/auto stock to yours are only 947$ over the year, which more than likely wouldnt even cover the cost of the rig after a year, the 4cyl saturn/honda/yota will save you roughly 3300$ over the year, which will effectively pay for the car after a year if it only costs 3300$ or less.

The 4cyl /5spd Xj seems to be the only compromise in XJ terms that makes sense, since you'll save about 2200$ with that setup, enough to pay for the cost of a cheap 4cyl 5psd xj most likely.
 
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