28.1 MPG? Really?

[paulscooter]

I installed a ATOTO Double din Android type radio and wanted to use the Torque OBD2 application. I bought a OBD2 BLUETHOOTH device to communicate with it and tried it out today. I went on a 180 mile trip to test it out. In the below photo you can see the results, I'm not really sure i believe it. I set up the display to read 6 things.
Top left is instantaneous MPG, middle top is avg MPG, top right is engine load
bottom left is GPS altitude, middle bottom is GPS speed, bottom right is OBD2 speed. The reason they are different is the jeep has 31" tires and the gearing hasn't been changed, so the real speedometer reads about 10% slow.
The top middle gauge shows the average MPG is 28.1, hard to believe. But whenever i check it when i fill the tank i always get 21 to 22 MPG. That is without adding on the extra 10% because the mileage showing on the trip readout is 10% low. So add approx 10% is 2 mpg so when i figure it out the MPG is about 23 to 24 mpg.
I got the jeep for my 75 birthday a few months ago and it was getting 18 MPG then, but i changed the plugs, wires, rotor, distributor cap, air filter, etc.

 

[Chris]

Fake news

 

[paulscooter]

I installed a ATOTO Double din Android type radio and wanted to use the Torque OBD2 application. I bought a OBD2 BLUETHOOTH device to communicate with it and tried it out today. I went on a 180 mile trip to test it out. In the below photo you can see the results, I'm not really sure i believe it. I set up the display to read 6 things.
Top left is instantaneous MPG, middle top is avg MPG, top right is engine load
bottom left is GPS altitude, middle bottom is GPS speed, bottom right is OBD2 speed. The reason they are different is the jeep has 31" tires and the gearing hasn't been changed, so the real speedometer reads about 10% slow.
The top middle gauge shows the average MPG is 28.1, hard to believe. But whenever i check it when i fill the tank i always get 21 to 22 MPG. That is without adding on the extra 10% because the mileage showing on the trip readout is 10% low. So add approx 10% is 2 mpg so when i figure it out the MPG is about 23 to 24 mpg.
I got the jeep for my 75 birthday a few months ago and it was getting 18 MPG then, but i changed the plugs, wires, rotor, distributor cap, air filter, etc.

View attachment 283537

Fake news

Well, like i said, i don't believe it either. But i don't know what i'm doing wrong. This is based on a 180 mile trip. I'll take some more trips and see how they compare.

 

[06lj]

I'm not sure if the TJ's pcm is very good for mpg estimates. I could be wrong. If so I would guess that your fuel tank size was not saved correctly when setting up the stereos obd2 information. I wouldn't worry about it and just replace that displayed guage with something else. Even new cars are not very accurate in their mpg averages. Replace you speedometer gear and figure it out at the pump.

 

[rancholago]

I use "Torque" on my Powerstroke, it seems to perform as expected, all the values that it reports are exactly where I expect them to be. I would think it would be acturate as its reporting what the computer in the vehicle sees.
As for mileage, that is one parameter that I dont read on my Powerstroke, so I have no experience to give an opinion of gas mileage.
https://torque-bhp.com/forums/?wpforumaction=viewforum&f=1.0Torque has a forum for information and formulas for "PIDS" I know when I was setting up my Torque app for my pickup there were tons of "PIDS" some even special for Powerstrokes, at best it is confusing and finding the correct PIDS for what you want readings for can be a PIA, atleast for me it was.
I think you might get more realistic readings if you visit the forum for the Torque app, and study the available PIDS.
I wouldnt say fake news, just maybe a little confused news that can probably be fixed.

 

[rasband]

This is a good new marketing technique:

I installed android auto, and improved my MPG by almost 400%!

 

[GASnBRASS]

Do it the old fashioned way:
Fill up til pump kicks off, drive til you need gas, fill up again til pump kicks off.
Divide miles driven by gallons added at second fill up.
Repeat for more accurate results.

 

[paulscooter]

I use "Torque" on my Powerstroke, it seems to perform as expected, all the values that it reports are exactly where I expect them to be. I would think it would be acturate as its reporting what the computer in the vehicle sees.
As for mileage, that is one parameter that I dont read on my Powerstroke, so I have no experience to give an opinion of gas mileage.
https://torque-bhp.com/forums/?wpforumaction=viewforum&f=1.0Torque has a forum for information and formulas for "PIDS" I know when I was setting up my Torque app for my pickup there were tons of "PIDS" some even special for Powerstrokes, at best it is confusing and finding the correct PIDS for what you want readings for can be a PIA, atleast for me it was.
I think you might get more realistic readings if you visit the forum for the Torque app, and study the available PIDS.
I wouldnt say fake news, just maybe a little confused news that can probably be fixed.

OK, thanks, I was just reading it and can see how much it can vary. I just assumed it was correct as it was displaying. I'll have to do a lot more reading and learning. thanks

 

[qslim]

My TJ doesn't even get that when I'm towing it on the car carrier.

 

[06lj]

My TJ doesn't even get that when I'm towing it on the car carrier.

Ha ha! Ain't that the truth. Sadly my towing mpg is still higher than my Jeep driving mpg.

 

[MountaineerTom]

Maybe it’s Meters Per Gallon.

 

[tworley]

Did you put in weight on the app? My torque app is actually pretty darn accurate, within .5 mpg I'd say

 

[L J]

looks like someone finally outdone Ol' billiebob

 

[pagrey]

I'm not sure if the TJ's pcm is very good for mpg estimates. I could be wrong.

You are not wrong. The main issue is the fuel injectors, they are not "metered" injectors. They are simply pulsed some random amount more or less based on what the O2 sensors tell them to do. Fuel trims are just based on this and depending on how your injectors shape up the trims are different. It wasn't until true metered injectors became common that real fuel economy was possible with any ECU. They've been around since at least 2000 but I don't know when they started to become more widely used.