How far are you getting on a full tank?


ColoJeep

Just a car guy
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Jan 30, 2021
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498
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Elev.9052'
First, my previous 97 TJ I had installed an automatic with no overdrive into was stolen. The local used TJ that I was made aware of happened to have the required automatic but it was an 04 so it had the .69 overdrive. I compensated for its overdrive with 5.38 gears which did that nicely. That's what boosted its mpg by nearly 3 mpg.
Of course I am just yankin your chain a little Jerry !;)

But help me understand how a 42RLE with a 69:1 O.D. with 5.38 axles, = 3.71 final ratio,
is so much better, ( 3 m.p.g.) over a 32RH with NO O.D. and 3.73 axles ? = 3.73 final ratio. all other things equal.
It would seem if anything the drive line losses would lose efficiency, (and mileage ).
After all the driveshafts are spinning 44% faster +/- .

It totally sucks that some POS stole your first TJ !
 

CherokeeKid

Member
Joined
Nov 27, 2020
Messages
52
Location
Oklahoma
3" lift and 33" Terra Grappler G2s. Calculated range 266 miles, practical range closer to 210. My wife likes to refill when there's 1/4 tank left. I like texting her pictures of the needle on the E.

View attachment 283109
My Jeep was once owned by Jon Voight which is probably why I average 13-14 city/highway combined with 4.0/NV3550, 4:56's, 33's, and 2 inch SL + 2 inch BL.
 

freedom_in_4low

Sacred Order of the Coil Spring
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Sep 26, 2019
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2,736
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Edmond, OK
Of course I am just yankin your chain a little Jerry !;)

But help me understand how a 42RLE with a 69:1 O.D. with 5.38 axles, = 3.71 final ratio,
is so much better, ( 3 m.p.g.) over a 32RH with NO O.D. and 3.73 axles ? = 3.73 final ratio. all other things equal.
It would seem if anything the drive line losses would lose efficiency, (and mileage ).
After all the driveshafts are spinning 44% faster +/- .

It totally sucks that some POS stole your first TJ !

I think his +3mpg claim is with the 42RLE, before and after regearing. So he's talking about a 42RLE with 3.73 or 4.1 gears, vs a 42RLE with 5.38 gears. Not that he got +3 between a 3.73 32RH and a 5.38 42RLE.
 

freedom_in_4low

Sacred Order of the Coil Spring
Supporting Member
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Sep 26, 2019
Messages
2,736
Location
Edmond, OK
My Jeep was once owned by Jon Voight which is probably why I average 13-14 city/highway combined with 4.0/NV3550, 4:56's, 33's, and 2 inch SL + 2 inch BL.
GwZDOziResS7nAyHd5Oq9l0UeoA7-s4WOap71E_koHw.jpg
 

C.J. Roberts

TJ Enthusiast
Joined
Jan 26, 2017
Messages
549
Location
Tucson, AZ, United States
I get 14+ mpg city driving. That means about 260 per tank, however I've never let it go beyond about 220. The Muddog has a 4.0, 5 speed, 31X 10.50s with 3.73 diffs. Speedo is accurate.
Interestingly enough, I get 12 mpg highway. 4th gear, 5th gear, 60, 65, 70, 75, all the same. I'm still waiting on someone to figure THAT out for me. That's why I don't roadtrip it any more.
 

WSS

Rock Stacker
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Joined
Jan 28, 2019
Messages
1,828
Location
California, southern part
First, my previous 97 TJ I had installed an automatic with no overdrive into was stolen. The local used TJ I bought had the required automatic but it was an 04 so it had the .69 overdrive. I compensated for its overdrive with 5.38 gears which did that nicely. That's what boosted its mpg by nearly 3 mpg.
So, you do not have the same specs on the new TJ that you had on your stolen TJ? That’s no bueno.
 

WSS

Rock Stacker
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Joined
Jan 28, 2019
Messages
1,828
Location
California, southern part
I am not sure what mpg road/asphalt is. I do know I went from ft Mojave to oatman and back and got 10.2mpg (using gps mileage and a top off before and after). Trip was mostly fire roads and sand washes. A few miles of asphalt.

32RH 3sp, 35” BFG MT’s, 4.56:1, Atlas II. Did not use low.
 
Last edited:

glowell222

TJ Enthusiast
Supporting Member
Joined
Nov 10, 2019
Messages
677
Location
Northern VA
Stock as a block: 310 miles on the highway with the hardtop and the cruise set at 71, which translates to 68 in GPS speed.
 

Zorba

"The Veiled Male"
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Apr 2, 2020
Messages
5,321
Location
Merritt Island, Fl
I've been getting about 14.5 overall, stock tires, 3.73, 6 speed. Filled up yesterday at 216.2 miles - about 15 miles past the yellow lite coming on.
 

Hal

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Joined
Nov 10, 2020
Messages
42
Location
St George, UT
How far can you go... forgetting the odometer at fill up, and then add in 4 Low, airdown, head winds, make life intresting. The thought of walking out 40 miles.. may become a funny memory someday, but just having the extra 5 gals just sitting there is great insurance. Much like having a winch, you seldom use it, and it's mostly used to get someone out of a terrible spot. Our 5 gal treasure is very welcome when we help some poor sole out of gas.. Anyway our take on the Brick on 4 Wheels milage..

IMG_20190501_151304447_HDR.jpg
 

WSS

Rock Stacker
Supporting Member
Joined
Jan 28, 2019
Messages
1,828
Location
California, southern part
How far can you go... forgetting the odometer at fill up, and then add in 4 Low, airdown, head winds, make life intresting. The thought of walking out 40 miles.. may become a funny memory someday, but just having the extra 5 gals just sitting there is great insurance. Much like having a winch, you seldom use it, and it's mostly used to get someone out of a terrible spot. Our 5 gal treasure is very welcome when we help some poor sole out of gas.. Anyway our take on the Brick on 4 Wheels milage..

View attachment 283268
"Luck favors the prepared"

Kali outlawed the old style cans. I bought a pair of 3gl rotopax and griped about it until I got used to them. Know I run a 2gl gas and water when doing local short trails and the two 3gl for longer runs.
 

Zorba

"The Veiled Male"
Supporting Member
Joined
Apr 2, 2020
Messages
5,321
Location
Merritt Island, Fl
"Luck favors the prepared"

Kali outlawed the old style cans. I bought a pair of 3gl rotopax and griped about it until I got used to them. Know I run a 2gl gas and water when doing local short trails and the two 3gl for longer runs.
Fuck Kali and their Nanny State laws! I had, and kept using, "old style" cans until the day I finally got the hell out!
 

WSS

Rock Stacker
Supporting Member
Joined
Jan 28, 2019
Messages
1,828
Location
California, southern part
Fuck Kali and their Nanny State laws! I had, and kept using, "old style" cans until the day I finally got the hell out!
Apparently, in the San Bernardino NF, rangers where actively looking for and citing folks with non-compliant cans about 4yrs ago. How is that for nanny state. "If you see something, say something" has a whole different meaning here in kali.
 
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