Secret vacuum line to save mpg
...nominated
CF Veteran
Joined: Aug 2010
Posts: 1,678
Likes: 0
From: Carlisle, PA
Year: 2000
Model: Cherokee
Engine: Inline 6
Originally Posted by purplegrocerygogetter
Lol, no height restrictions in back seat! Lmao!
CF Veteran
Joined: Oct 2011
Posts: 4,440
Likes: 3
From: Seal Beach, CA
Year: 1996
Model: Cherokee
Engine: 4.0 HO Straight Six
Originally Posted by purplegrocerygogetter
Lol, no height restrictions in back seat! Lmao!
CF Veteran
Joined: Feb 2011
Posts: 2,523
Likes: 1
From: Eau Claire, Wisconsin
Year: 2000
Model: Cherokee
Engine: 4.0
Originally Posted by 1996sportXJ
Well... In an XJ, you can tint your windows, fold down the back seat, lay down some blankets and......... Take a (dump?)
CF Veteran
Joined: Aug 2011
Posts: 1,031
Likes: 4
From: Blue Springs, MO
Year: 1993
Model: Grand Cherokee
Engine: 4.0L Laredo
Many years ago we discovered that if we put a four foot garden hose in dad's old '65 Dodge and applied a good vacuum, we'd get a good supply of cruisin' juice. It didn't really help with mpg, but it really decreased our dollars per mile. 
Newbie
Joined: Nov 2011
Posts: 29
Likes: 0
From: Modesto
Year: 1992
Model: Cherokee
Engine: I6 4.0
If you lube up the muffler bearings with ATF and fill the blinker fluid with
liquid nitrogen I've heard of people getting 50 MPG's easy on an xj.
BTW, my jaw hurts from laughing so hard from this post
liquid nitrogen I've heard of people getting 50 MPG's easy on an xj.
BTW, my jaw hurts from laughing so hard from this post
Seasoned Member
Joined: Oct 2011
Posts: 255
Likes: 0
Originally Posted by Bustedback
If you use water from the Pacific ocean you'll get another 4mpg compared to water from the Atlantic ocean.
CF Veteran
Joined: Nov 2011
Posts: 1,469
Likes: 0
From: State College, PA
Year: 1995
Model: Cherokee
Engine: 4.0 I6
The main things that I've done to gain MPGs are:
1) Remove the serpentine belt, that thing will really bog the engine down.
2) Run the AC at all times, it helps keep the engine cool, so it runs more efficiently
3) Fill up with 93 octane and ALWAYS use the "jet fuel" octane booster from Walmart
Do these things and you'll get 55-65 mpgs in town no problem
1) Remove the serpentine belt, that thing will really bog the engine down.
2) Run the AC at all times, it helps keep the engine cool, so it runs more efficiently
3) Fill up with 93 octane and ALWAYS use the "jet fuel" octane booster from Walmart
Do these things and you'll get 55-65 mpgs in town no problem