Trying to make a MPG chart for tires/gearing. Please post here...

[5-90]

An admirable effort, but one that should have its final product LOADED with disclaimers! There are too many variables to take into account, with engine maintenance and condition topping the list!

I think the Yahoo! group on using acetone in fuel is called "pes_acetone" or something similar - might be worth checking out. Also, Google "Pure Energy Systems" and see what you find out.

I tried acetone for a little while - I didn't get the boost they claimed, but I did get some increase, and it didn't go away immediately when I stopped (which means it was probably due to cleaning.) Acetone is already used in gasoline as a cleaning additive, so you're not adding something that isn't there, you're just changing the concentration of something that is.

I don't run acetone constantly anymore, but I do run about 4oz/tank every other month as a "maintenance cleaning," which does seem to keep that extra 2mpg or so around...

5-90

 

[goodburbon]

4.0, Aw4, 33", 4.10, 14.6 avg, 18 hwy, 13 town, without roofrack
subtract 2 from all above mileage numbers for "with roof rack"

 

[XJSTANG]

1996 4.0L/aw4 with 4.5 lift on 33x12.50x15 trxus on 15x8 steel rims w/ 4.56 gears and I get 17 to 18 MPG driving backroads 55 to 60 MPH 100 miles a day, with the AC off and with all four windows down. Also I have a C4x4 bumper with a full sized spare, rock rails, and I carry alot of tools and stuff in my Jeep. Oh and to increse my drag I have a surco roof rack up top holding my hi-lift. I hope this is complete enough of a list.

Edit: My Jeep has 102k on it with decent routine maintenance.

 

[Jump This]

Okay I'll bite....
4.0, 4:88 and 33's. Its getting an average of 22mpg. Wait....I hadn't changed out my speedo gear when I calculated that (the first clue was when it said I was going 100mph down the highway and I got passed by a Hodaka )
I'm getting 12mpg average, don't drive highways much....
Hey, I live in the desert, we don't have highways!

Rick R

 

[xj trenton]

Ok 33 with factory 355 gears I think I get 12- 45 mpg depending on how far the next station is when I run out lol.

 

[HotChiliRam]

33's, AW4, 4,56's, 4.0, I get 12mpg (Street & Highway), I was getting 14 Mpg's before my injectors change.

 

[shmoken875]

14-16 mpg 4.0/aw4/3.55/34's

 

[andrew2516]

34"s ...3.07's ...4.0H.O....12mpg

 

[jmsull]

'99 auto, 4.0L, 3.55, 4" lift, 32" BFG AT's, Yakima rack with wind deflector, 500lbs in armor, hitches F/R, dual batts etc., 12mpg city 15mpg hwy

 

[acrid]

31's closer to 30's right now.
3.07's.
manual 5 spd.
94 bored tb (60mm)
4.5 lift
18 in city 22 on hwy.
roof rack with windscreen full spare on top hi jack on top. custom bumpers front and rear.

(on the lift issue) a brick is a brick no brick is aerodynamic.

3+ mpg on freeway after windscreen

best i ever got was 25 from oregon coast to portland 2 4th of july's ago.
(wind was going my way)

on the acetone issue, it lowers the s/t of the gas, (surface tension) allowing it to vaporize more easily at lower temps ... and cleans the engine.

 

[muddshutter]

35's with 4:88's and getting 19 mpg city 24 highway

 

[RyleyF]

89 4.0 Aw4, 3.55 gears, 3" lift, 31's, 14-15mpg city, 18.5 mpg highway.

 

[xjaddiction]

88' Jeep Comanche, 4.0, aw-4, 5:13's, 38x14.50x15 TSL's on a 10" rim,

=


9 MPG AVG.

 

[MachineMan]

'90 XJ 4.0L, AW4, 35's, 4.56gears, 6.5" lift, heavy bumpers etc.

When fully loaded:
17 freeway
14 city
11 wheel'n

 

[mrrbby]

99 Sport, stock suspension/tires, 4.0, auto, 3.55's
14-19 mpg

96 Sport, 6" lift, 34's, 4.0, auto, 3.55's
12-14 mpg
This one never sees the interstate due to the gearing. I'm regearing when I install my d44.