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Unread 03-06-2006, 02:25 PM   #1
Fugative
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Improve Fuel Econ Tips

I think I'm getting pretty bad fuel economy. I'm not much of a motor head so I'm wondering what things I should / could do myself to improve economy..

The vehicle is a stock 1993 grand cherokee ltd with 5.2l V8.

Please let me know if each one is worth the effort

Tires pressure
1) already checked

Air Filter
1) replace with K&N (Just filter)
2) replace with generic (just filter)
3) replace with whole K&N kit

Spark Plugs
1) Check and re-gap
2) replace and re-gap

Wires
1) replace existing wires (bosch?)

Fuel Pressure Regulator
1) is it worth testing and replacing?

Any other ideas would be welcome (for a simple diy guy with no shop or even garage)

Current mpg is around 13 (mostly city but some hiway), hoping to get around 19 (any chance??)

And yes I have searched the forums but "mpg" keeps getting discarded as it is too common (yet still I can't find info)

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Unread 03-06-2006, 02:29 PM   #2
BlaineWasHere
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You won't get 19... no way... ever
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Unread 03-06-2006, 02:31 PM   #3
grandCherokee06
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You can switch to Vegi Oil.
Or drive like a grandma

But, you can replace like cap, rotor, plugs, wires, etc. You wont get much though...
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Unread 03-06-2006, 02:32 PM   #4
Fugative
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yeah I figured that.. Even though I't couldn't hurt to do some of the above.. Just bought it used and the last mechanic (16 months records) has no history of any of the above being checked or done. What worth worring about and what isn't?
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Unread 03-06-2006, 02:32 PM   #5
Fugative
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yeah I figured that.. Even though I't couldn't hurt to do some of the above.. Just bought it used and the last mechanic (16 months records) has no history of any of the above being checked or done. What worth worring about and what isn't?
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Unread 03-06-2006, 02:34 PM   #6
Woody
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You could do all of that, it couldn't hurt. I bet you won't get higher than 17 or so.
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Unread 03-06-2006, 02:37 PM   #7
Fugative
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In truth I can live with anything cause the vehicle rocks in every other way! Since I'm currently getting 13 I figured It might need some minor tweaking, just looking for the best bang for the buck. Air filter (k&n) and new plugs is easiest but don't want to miss something else thats simple.
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Unread 03-06-2006, 02:40 PM   #8
grandCherokee06
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Get a tornado..


but, how do they work ? im curious my self
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Unread 03-06-2006, 02:46 PM   #9
KWAG
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Quote:
Originally Posted by grandCherokee06
Get a tornado..


but, how do they work ? im curious my self
Rip off... dont bother
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Unread 03-06-2006, 02:52 PM   #10
Fugative
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Yeah.. If I listen to 1993 ZJ it's simple:
1) Get grandma to be my chaufeur
2) Switch to free vegi oil from the dumpsters outside mcdonalds
3) use a tornado
4) don't forget the fuel catalyst (drop tin can in fuel tank)
5) Wind deflector on hood
6) only drive with the wind at my back
7) anything else

LOL
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Unread 03-06-2006, 02:54 PM   #11
walter_da_jpr
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Try some of these.

http://jeepforum.com/forum/showthread.php?t=229365

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Unread 03-06-2006, 03:12 PM   #12
cubanlorenzo
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im getting 18.0- 18.4 in my 2000 4.0 duing town driving. highway im getting 21.9-22.3. so i cant complain about gas milage. but if i were worried about gas milage then i wouldnt have bought a jeep!!! if getting that extra 1mpg matters so much then you shouldnt have a jeep

Last edited by cubanlorenzo; 03-06-2006 at 03:48 PM..
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Unread 03-06-2006, 03:35 PM   #13
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Quote:
Originally Posted by grandCherokee06
Get a tornado..


but, how do they work ? im curious my self
They don't. Unless you put a Tornado sticker on the back of your Jeep. That'll give you 10 extra mpg and 20+hp!
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Unread 03-06-2006, 04:03 PM   #14
BlaineWasHere
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Quote:
Originally Posted by grandCherokee06
Get a tornado..


but, how do they work ? im curious my self

The don't work...
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Unread 03-06-2006, 04:07 PM   #15
walter_da_jpr
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Besides common sense not to buy this scam, Popular Mechanics has shot down most of these myths including the tornado and magnetic line things etc. They just don't work. Only proper maintenance and a conservative driving style.
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