MPG depending on tank fullness?
Thread Starter
JK Super Freak
Joined: Oct 2011
Posts: 1,384
Likes: 0
From: North Jersey
Originally Posted by ronjenx
How many times have you observed the difference between a 1/2 tank fill-up, and an empty tank fill-up?
How far do you drive right after each fill-up before parking the Jeep?
How far do you drive right after each fill-up before parking the Jeep?
JK Jedi Master
Joined: Feb 2008
Posts: 12,907
Likes: 185
From: Maine
Here's a snapshot of the past few weeks for example. The results of the fill up don't show until the next fill up.
Attachment 338278
Attachment 338278
Why doesn't it tell you the mpg as soon as it knows how much fuel was used and the distance?
For example, why is the top line of data missing the mpg, when it knows how much fuel was pumped in?
When I do this by hand, I immediately know the mpg.
Last edited by ronjenx; Jul 6, 2012 at 09:13 PM.
JK Enthusiast
Joined: Mar 2012
Posts: 438
Likes: 1
From: south, florida
Originally Posted by notsoricer
Thanks, you must be really smart. But not smart enough to read that I CALCULATE my milage and not rely on any fancy on board computer. When I fill up approximately half (11gal), I get better milage than a full fill up (usually 20 gallons). I use "gas cubby" app and I sometimes do the math on paper. The app is just as accurate plus it saves all your data.
This isn't another "how can I get better mpg?" post but thanks for you concern and constructiveness.
Btw, crack is wack.
That method is fine over a large sample reading but won't work on small partial tank calculations with any real accuracy. Not for the plus or minus a few MPG readings you all are looking to figure out.
JK Freak
Joined: Feb 2012
Posts: 692
Likes: 12
From: Arkansaw, Wi
I have 5k on my Rubi. I always did the mileage by hand. I got bored with the process because my numbers rarely changed. My travel circle is quite small which allowed me to always use the same fuel pump. I've filled up with the tank any and all volumes and my numbers range from 17.3 to 18.1. I stopped at about 4300 miles.
JK Enthusiast
Joined: Oct 2011
Posts: 202
Likes: 0
From: Kentucky
A lot of differant variables to calculating gas milage. Weather, terrain, traffic, grade of gasoline, etc. My sister work at the main office of a large oil/ gas producer and she says they have over 200 differant blends they use, so I'm sure that's a factor.
JK Enthusiast
Joined: Sep 2008
Posts: 132
Likes: 1
From: Texas
I can agree with this, I always burn the bottom half of the tank way faster than the top half.
JK Jedi Master
Joined: Feb 2008
Posts: 12,907
Likes: 185
From: Maine