The Official "My Gas Mileage *****" Thread

Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.

windman

Full Access Member
Joined
Mar 19, 2013
Messages
68
Reaction score
1
Location
Ankara Turkey
ours show 1 liter less at overhead console when running on LPG. when calculating i am filling our LPG tank to full, and measuring it when i refill it.
 

Dave

Administrator
KJ Supporting Member
KK Supporting Member
Joined
Feb 22, 2006
Messages
15,567
Reaction score
15
Location
on here
For everyone who is posting their MPG's or L/100kms, how are you getting your numbers? Are people just getting it from the overhead console, or are you doing the math yourself at the pump?

I am asking because I do the math myself at the pump, I do not have an overhead console. I average 16-17 MPG with alot of hiway driving. But I noticed that when I plug my OBDII reader in, it tells me Im getting a much higher MPG then I have ever actually gotten.


I think you might need to dig out your OBDII instructions and see if there is a way to set the number of gallons your tank holds in order to get a correct mpg reading.


Dave
 

KJ604

Full Access Member
Joined
Aug 29, 2015
Messages
417
Reaction score
1
Location
Vancouver BC
I think you might need to dig out your OBDII instructions and see if there is a way to set the number of gallons your tank holds in order to get a correct mpg reading.


Dave

I use a bluetooth OBD device with the Torque app and the size of the fuel tank and all parameters have been set correctly for the vehicle.
 

metalmoto

Full Access Member
Joined
Jun 6, 2015
Messages
153
Reaction score
2
Location
Philadelphia
11 MPG on my old 2002

I might get 12 MPG with a strong tailwind:shrug: 151,000 miles on her. Been replacing something about once a week, when I have the cash. Last weekend replaced water pump and thermostat. This weekend replace cracked radiator and hoses and rear brakes. Still need to replace power steering pump and hoses. Alternator,valve cover gaskets... I feel like I'm throwing my money away!
But a recent 18 inches of snow, made me glad I bought the Jeep. I put her in 4 wheel drive, and just plowed though the white stuff, like it was shaving cream:happy160: Who know how long it will last... My first Jeep and I'm having fun with it! When it dies, I might buy another one, and just swap all the new parts, into the next one...:happy3:
 

Hockeygoon

Full Access Member
Joined
May 7, 2014
Messages
253
Reaction score
2
Location
Manhattan Kansas
I might get 12 MPG with a strong tailwind:shrug: 151,000 miles on her. Been replacing something about once a week, when I have the cash. Last weekend replaced water pump and thermostat. This weekend replace cracked radiator and hoses and rear brakes. Still need to replace power steering pump and hoses. Alternator,valve cover gaskets... I feel like I'm throwing my money away!
But a recent 18 inches of snow, made me glad I bought the Jeep. I put her in 4 wheel drive, and just plowed though the white stuff, like it was shaving cream:happy160: Who know how long it will last... My first Jeep and I'm having fun with it! When it dies, I might buy another one, and just swap all the new parts, into the next one...:happy3:

It doesn't end.
 

renegade 04

Full Access Member
Joined
Jan 3, 2014
Messages
1,466
Reaction score
18
Location
Albany New York
Maybe a good idea to change the spark plugs if your MPG is that low, because that was about what mine was before I change them.
 

MattsJeep

New Member
Joined
Jul 10, 2018
Messages
8
Reaction score
0
Location
Arizona
26 pages! I'll just add this, because drivers getting 11 or 14 is utterly depressing....
I'm getting 18.5 on first tank! Lotsa highway! Yippee!!!!

New to me, 2004 with 150k on the clock.
First thing is air filter.
Already did first, first thing- air pressure in tires.
 

Aceofspades

Full Access Member
Joined
Jan 24, 2017
Messages
803
Reaction score
108
Location
Buffalo
Check my sig. been racking up miles trying to get a good mpg. All maintenance done. Still averaging about 210 miles till the light comes on combined driving.
 

MattsJeep

New Member
Joined
Jul 10, 2018
Messages
8
Reaction score
0
Location
Arizona
Did the air filter, changed the gaskets for valve covers, new plugs (old ones were def old. electrodes worn 1/2 way down).
Just a teaser.....
Because I haven't taken it out for a spin, yet. Gotta get a tank into it. My guy does not have a readout (wouldn't trust it). I need to get the mileage and the fuel measurements for a tank.
 

Dave_too

Full Access Member
Joined
Nov 2, 2019
Messages
68
Reaction score
41
Well to be honest this is the number one complaint of many KJ'ers fortunately, there are some things you can do.

Basic Things:
1.) Check Air Pressure of tires, lower pressure = more rolling resistance.
2.) Check to make sure air filter is clean.

Mods:
1.) Cat Back Exhausts are known to help mpg by 1~2 mpg sometimes 3.
2.) Aftermarket Cold Air Intake or Drop in K&N filter
3.) High Flow Catalyic Converter
4.) Some people have mentioned with a throttle body spacer does help. (I can't verify this, because I don't have one)
5.) Synthetic Oil supposed to give maybe 1~2 mpg with a good filter.
6.) Some people mention better spark plugs can help

Things that make MPG go down.
1.) Lots of Lights / Baskets
2.) Bigger Tires
3.) Lift (I noticed after I did the clevis it dropped, but it really didn't change much after my lift-The slight tilt must add better air flow)
4.) Huge heavy sub boxes
5.) Full car load of people
6.) Under inflated tires
7.) Pulling a trailer
8.) Excess drain on alternator
9.) Air Conditioning
10.) Opening Windows
11.) Offroading
12.) Winter Gas
13.) Driving Hard - be nice to it and it will be a little nicer to your pocket.
14.) Excess weight in general - Skid Plates, Brushgaurds ...
15.) The computer gets mad if it doesn't go offroading every month, and deciedes to dump lots of fuel into the motor- So make sure you take her out every once and a while.

As I side not I found my Liberty gets the best MPG at 61 mph.


Bennett

on the highway with 2 people, a dachshund and luggage

98 octane with 5% ethanol

At 82 (130kph) = 18mpg
at 75 = 20mpg
at 70 = 22mpg
at 65 = 24mpg

City = 15mpg
 

CrazyDrei

Space Monkey
Joined
Dec 10, 2020
Messages
176
Reaction score
161
Location
Maine
I am so envious of all ya'll. Last tank I made it about 7 miles before refueling, I am sure 60 hours if idling didn't help much.

You must be registered for see images attach


But then again I'm running 33" tractor tires in 4x4 low and last week hit the all time high speed record of 16 miles per hour down my driveway!
 

WyldWolf777

Active Member
Joined
Jan 3, 2022
Messages
125
Reaction score
48
Location
Weslaco TX
the best gas ever

I find that I get the best gas milage when my jeep is in park, and turned off. or when it's in nuetral and rolling down a damn hill. other than that it *****. I have a question though....


the 3.7 v6 is not a huge engine but is by no means anyones biaaatch. However it revs very very high. The other day I was stuck behind a stopped bus. I had a car approaching from behind in the other lane about 20 yards back. So I put the pedal to the floor, pulled out infront of the car... the engine almost red lined and I almost got hit cause the friggin jeep did not move forward. It's like a barking dog that has no teeth.

I blame this on a 4 speed auto trans. I almost feel it would pay off (in a year or two) to try and locate a 5 speed, then try and sell the 4 speed. I wonder how much that would cost.
Hilarious... Mine uses more gas turned off in park than running so I just leave it on 24/7
 

redpoint5

New Member
Joined
Apr 14, 2012
Messages
16
Reaction score
0
Location
Portland, OR
Air filter does nothing to improve fuel economy. NOTHING.

I've already explained that the throttle is what limits the amount of air to your engine more than anything. That's it's purpose, to restrict airflow to the engine. That's what's being "throttled".

A free flowing filter might allow a bit more air at wide open throttle, which is pointless to the discussion of fuel economy.

So, everyone enjoying recent fuel prices?
 

Latest posts

Members online

Top