Jeep Wrangler Forum - Reply to Topic
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > TJ Jeep Wrangler Forum > TJ General Discussion Forum > 20 mpg on my tj!!!

Join Wrangler Forum Today


Thread: 20 mpg on my tj!!! Reply to Thread
Title:
  
Message:
Post Icons
You may choose an icon for your message from the following list:
 

Register Now

In order to be able to post messages on the Jeep Wrangler Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Additional Options
Miscellaneous Options

Topic Review (Newest First)
05-08-2013 10:03 AM
ChaddG thank you
05-08-2013 08:10 AM
idiot magnet original poster
05-08-2013 08:05 AM
ChaddG 17.5 mpg this last tank, combined city hwy. 50/50 city hwy

Please tell me what is OP and why does everyone keep calling me that?
05-07-2013 03:03 AM
eagle223
Quote:
Originally Posted by OhSixTJ View Post

And supposedly jailbroken iPhones, but I haven't figured that one out yet.
I may have to try that to get that app lol
05-06-2013 09:43 PM
OhSixTJ
Quote:
Originally Posted by eagle223 View Post

Damn
And supposedly jailbroken iPhones, but I haven't figured that one out yet.
05-06-2013 09:40 PM
AB824
Quote:
Originally Posted by jefferyc22 View Post
I was trying to do the % math yesterday.
So if my speedo says 60 and GPS says 64 is this the right math?
64 divided by 100 equals 6.4......So 4 divided by 6.4 equals .625 or .625 percent error?
Multiply your speedometer or odometer by 1.0667 to get your real mph/ mileage.
05-06-2013 09:30 PM
eagle223
Quote:
Originally Posted by OhSixTJ View Post

Torque. Only available on android, unfortunately.
Damn
05-06-2013 09:19 PM
OhSixTJ
Quote:
Originally Posted by eagle223 View Post

What app is that?
Torque. Only available on android, unfortunately.
05-06-2013 08:52 PM
eagle223
Quote:
Originally Posted by OhSixTJ View Post
Who said it wasn't possible??
What app is that?
05-06-2013 05:22 PM
OhSixTJ
Quote:
Originally Posted by n00g7 View Post

Of course, I knew you were cheating in some way, just not which one.

Well, actually I did, the revs are pretty low for highway speeds.
Btw, I'm on 33s (really 31.5) and 3.73.
05-06-2013 04:34 PM
JeepCreeper
Quote:
Originally Posted by s14sh3r View Post
Anecdotal. I've done the same thing and it's not an accurate representation of your actual fuel economy. Test it again, only this time over a period of, say, 30 days. 30 days of normal driving. Fill it up completely before you start the test, and fill it up at the completion of the 30 days. The longer the testing period, the more accurate the results will be.
During the 30 day test, do I put the jeep in neutral when I have to push it after its out of gas? My Jeep will not last 30 days on one tank.
05-06-2013 04:33 PM
cbolling I had to go back and see if this thread started on 4/1/13.
05-06-2013 03:55 PM
n00g7
Quote:
Originally Posted by OhSixTJ View Post
Haha that's because I wasn't going down a hill I was cruising a straight flat road at about 50 mph (speed limit is 40 but I'm a rebel).

Also, I hope you realize I'm joking. While I did get that mpg number the whole time I maintained that speed, that's way to slow to be driving
Of course, I knew you were cheating in some way, just not which one.

Well, actually I did, the revs are pretty low for highway speeds.
05-06-2013 03:49 PM
OhSixTJ
Quote:
Originally Posted by n00g7 View Post

I'm just surprised the phone sits on your leg given the slope of the hill you're going down

I drove super conservatively for 1/2 a tank to see what would happen and got 15.5mpgs.... fail. I'd rather run 13-14mpgs and not drive like a senior citizen.
Haha that's because I wasn't going down a hill I was cruising a straight flat road at about 50 mph (speed limit is 40 but I'm a rebel).

Also, I hope you realize I'm joking. While I did get that mpg number the whole time I maintained that speed, that's way to slow to be driving
05-06-2013 03:46 PM
n00g7
Quote:
Originally Posted by OhSixTJ View Post
Who said it wasn't possible??

I'm just surprised the phone sits on your leg given the slope of the hill you're going down

I drove super conservatively for 1/2 a tank to see what would happen and got 15.5mpgs.... fail. I'd rather run 13-14mpgs and not drive like a senior citizen.
05-06-2013 03:34 PM
OhSixTJ Who said it wasn't possible??
05-04-2013 04:32 PM
wranglerbob1
Quote:
Originally Posted by jimmy_buckle View Post
I agree.....I'm 19 and my fuel reading that I get from my scan gauge tells me I can get about 28 MPG on the highway. Now I know this is incorrect (people have suggested because I am using a Canadian Gallon or something like that.....i'm from AUS so I have no idea about Gallon's. I work in litres)

I have 35's with a 4.5 inch lift.....not sure if PO previously regeared. I think ge did due to the revs I actually get on the highway.

My point: I drive my TJ and love it. If I drive to work in it or if I drive it out bush I love it....I fill it up when the indicator tells me its nearly empty and that's that. No matter what you're getting I think we can agree on one thing.....we drive saaweeeet cars
Well Played!!!! If you are worried about gas then you dont need a jeep!
05-04-2013 01:42 PM
pineda22 readin this thread has made me question some things ppl have said vs the experince/schooling for my degree in automotive tech.....I AM NOT BASHING ANYONE nor do i mean to offend but here goes


#1 toping off your tank after the pump "clicks off" can damage the EVAP system on new vehicals i cant rember exactly what it does as ive been out of school for 5years
topping off the tank will actually throw a MIL light on the newer F-150s at work

#2 when the OP described the prosses of disconnecting the bat cable this will not harm any electronics this is a procedure we have used many time where i work it simply clears stored memory you can also remove bolth + & - and tape them together for 10 min without turning key on or light on

#3 when the OPposted "repeated 50 times for 200 miles i belaeve he ment 50 key starts run to operating temp) in 200 miles. driving easy ie no heavy throttle most vehicles will rember the last 50-100-200 key starts (chevrolets at at the highest of the list) by clearing the memory of the computer the 1st 50 key starts will "reprogram" the jeeps driving style however in my experance this has never been a notacible change at least for the jeep

anyway theres my .02 hope i didnt pi** anyone off
05-04-2013 09:56 AM
Kevbz And we realize that any jeep with a "15 gallon tank" really has a 19 gallon tank with and extended filler check valve to keep it at 15. Yes, Jeep sold that upgraded capacity for a markup and only had to swap filler check valves. I have a 15 gal tank so i always have an air pocket!

My 4cyl with 33" tires, 4.10's constantly gets 18, today's fill up showed 20. I check every tank, every time. I always fill all the way up and after the click of the pump going off, run it again until it clicks off again, usually another .5 gallon.

From that point I can drive (like this week) 232 miles until I fill up again, same procedure. And even though the gauge is as low as I dare to let it get, it never takes more than 11.5 gallons in my 15 gallon tank.

Moral of the story is, buy a Volt (GO 'merica!)

Also, there is a switch over of winter blend fuel to summer blend in the swing climate states, and if they are selling winter blend, and you have an unseasonably warm week...you will get better MPG's....throw that into the calculations....
05-03-2013 06:05 PM
ChaddG It must have been a lucky week when I got the 20 mpg, conditions perfect.
this tank is getting 17 mpg combined cty hwy
the temp has dropped 40 deg.
windier then chicago,

Here is a thought, why doesn't one of you let me use their computer to catch appropriate mpg?
I will do a study of things I do and record the results.

I only use one gas station, about a mile from my house.
Very level

I know my mpg will not stay at 20, unless all the roads are flattened, wind only blows behind me, the temps stay in the 65-80 range, and no parts wear on my jeep.
I will try replacing the 12 year old o2 sensors too. I am kinda scared to though, that whole if it isn't broke don't fix it thing.
05-03-2013 12:31 PM
jeepndon
Quote:
Originally Posted by krisbman View Post

I travel from junction city to woodburn on I-5 and can only muster around 15 mpg. Anyone saying they get 18-20 mpg with 33 12.50 15's is full of malarky.
I just traveled to NM from Denver going down RT 160 over two passes in the San Juan's last night and got 17.5 mpg on 33x10.5 15 so your statement is malarkey. On previous trips going to Trinidad co I get 20mpg.
05-03-2013 11:46 AM
aikmanson
Quote:
Originally Posted by jefferyc22 View Post
I was trying to do the % math yesterday.
So if my speedo says 60 and GPS says 64 is this the right math?
64 divided by 100 equals 6.4......So 4 divided by 6.4 equals .625 or .625 percent error?
No, just, no.

Anyway I am skeptical about the OP's adaption theory netting that many MPG's, but whatever I guess it is worth a try. 20 MPG's seems way too unlikely.

I know Rubicon's are heavier, but with my Rubicon stock, 5 speed with 31's and 4.10's, I was getting around 15-17 mpg, managed 18mpg with a slight tailwind on the highway once (and <15 with crazy cross winds before too). With my Winch + Plate + Bumper, it has seemingly gone down a bit.

I added a banks exhaust, I still calculate my MPG's every fill up (like someone else mentioned, it is easy to pump another gallon in after it clicks off, so multiple tanks will yield more accurate results). It will be interesting to see if the Bank's does anything for MPG's as some reviews have said. I am going to say it will do absolutely nothing, and I am cool with that.

Sorry OP, no matter what you say, no body is going to believe you. This is a forum, whether you are being truthful or not, ignorant or not, there will always be non-believers. Count me in on a non-believer on this one however.
05-03-2013 11:25 AM
n00g7
Quote:
Originally Posted by Rubi513 View Post
6.66666% error

Winner!
05-03-2013 11:20 AM
Neil F.
Quote:
Originally Posted by jefferyc22 View Post
64 divided by 100 equals 6.4?
=0.64 but nevermind How do you calculate percentage error
05-03-2013 11:16 AM
Rubi513
Quote:
Originally Posted by jefferyc22 View Post
I was trying to do the % math yesterday.
So if my speedo says 60 and GPS says 64 is this the right math?
64 divided by 100 equals 6.4......So 4 divided by 6.4 equals .625 or .625 percent error?
6.66666% error
05-03-2013 10:33 AM
n00g7
Quote:
Originally Posted by jefferyc22 View Post
I was trying to do the % math yesterday.
So if my speedo says 60 and GPS says 64 is this the right math?
64 divided by 100 equals 6.4......So 4 divided by 6.4 equals .625 or .625 percent error?
Definitely not.
05-03-2013 10:29 AM
jefferyc22
Quote:
Originally Posted by Patrick H View Post
You're right about speedometer accuracy, but to be accurate in your inaccuracy, your speedometer isn't simply off by a certain MPH, it's off by a percentage. The faster you go, the farther it's off. For example, when you're at a dead stop, your speedometer is exactly accurate @ 0 MPH.
I was trying to do the % math yesterday.
So if my speedo says 60 and GPS says 64 is this the right math?
64 divided by 100 equals 6.4......So 4 divided by 6.4 equals .625 or .625 percent error?
05-02-2013 10:57 PM
dcmtex As others have said, no sense worrying about fuel mileage if you drive a TJ.

Fiction sometimes can seem like reality if you want to believe it badly enough though
Theres no place like home,theres no place like home
05-02-2013 10:35 PM
Patrick H I'm certainly not "worried" about the fuel economy of my TJ.....It gets better mileage than any of my other Jeeps/ trucks/ 4 wheel drives/ cars ever got..
05-02-2013 10:06 PM
Waldo1
Quote:
Originally Posted by jgorm View Post
This thread has so much BS! A cai is not going to get you any mpg. I have tons of mpg data from before and after my cai and there is no difference. Using the gas gauge is a total waste of time for calculating mpg! the only thing that is legit is that if the ground is not perfectly level, it can alter how much gas goes in the tank by a few gallons. I notice this at a lot of the stations I go to. A couple degree slant will affect how much it takes. I have 72 gas tanks worth of data so far including the top I was using, trip miles, odo, scan gauge data, tires, etc.
read the thread before you bash, no mention of cai, or using gauge to caluclate mileage other than you and 1 previous post
This thread has more than 30 replies. Click here to review the whole thread.

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


All times are GMT -5. The time now is 02:08 AM.



Jeep®, Wrangler, Liberty, Wagoneer, Cherokee, and Grand Cherokee are copyrighted and trademarked to Chrysler Motors LLC.
Wranglerforum.com is not in any way associated with the Chrysler Motors LLC