What is your lowest MPG with the Diesel?

[ATX_Jeeper]

I'm seeing 16.9 on the dash with the Mopar lift and Nitto RG 35s. This is 95% city driving. Speedo is calibrated with a Tazer.

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[jcarbs]

In Houston with Toyo AT3 35s and with a 50/50 highway and city driving, I'm seeing an actual 16.2 mpg. I don't have a Tazer and have not recalibrated for the new tires yet. To be honest, I usually don't trust what the dash is telling me my mileage is.

 

[ATL_Rubi]

Stock 23 Rubicon 8at, 12.9 mpg but my drives are ~5 miles one way to work, and it's 4 stop signs on hills, and stop lights on hills.

 

[ATX_Jeeper]

In Houston with Toyo AT3 35s and with a 50/50 highway and city driving, I'm seeing an actual 16.2 mpg. I don't have a Tazer and have not recalibrated for the new tires yet. To be honest, I usually don't trust what the dash is telling me my mileage is.

The ecu uses tire size to determine MPH and MPG. If you don't recalibrate, its off. My jeep was reading up to 26 MPG highway on when the ecu thought the tires were 32"

I also use the Fulley app and its pretty close to what the dash is telling me.

 

[ATX_Jeeper]

Stock 23 Rubicon 8at, 12.9 mpg but my drives are ~5 miles one way to work, and it's 4 stop signs on hills, and stop lights on hills.

I'm relieved to read that as I thought I might have had an underlying issue with my JT.

 

[ATL_Rubi]

also, don't forget to calibrate if you adjust your tire pressures down. Jeep delivers the tires at 40psi, which is enough for them to be their actual size. When I went from 40 to 33 PSI, my tires lost half an inch or so, changed the MPG and MPH enough to be measured by gps.

 

[ATL_Rubi]

The ecu uses tire size to determine MPH and MPG. If you don't recalibrate, its off. My jeep was reading up to 26 MPG highway on when the ecu thought the tires were 32"

I also use the Fulley app and its pretty close to what the dash is telling me.

I use fuelly, and make sure my speed is tracked via GPS, no speed anomalies, but my Jeep reports 15ish MPG while fuelly reports low 14s. Not sure who's right and just gave up caring.

 

[ATX_Jeeper]

also, don't forget to calibrate if you adjust your tire pressures down. Jeep delivers the tires at 40psi, which is enough for them to be their actual size. When I went from 40 to 33 PSI, my tires lost half an inch or so, changed the MPG and MPH enough to be measured by gps.

I'm not sure I follow. I measured my tires at pressure, 34 PSI, while mounted on the JT and used that number in the Tazer. Are you suggesting the tire fill alert setting somehow affects this equation?

 

[ATL_Rubi]

Negative, Most people forget to realize that once they adjust tire pressures, the computer still reads a 32"+ tire, where as at 30-35 PSI, the tire is more like 31.5+. IF you measured at your desired PSI you are good to go.

 

[jcarbs]

The ecu uses tire size to determine MPH and MPG. If you don't recalibrate, its off. My jeep was reading up to 26 MPG highway on when the ecu thought the tires were 32"

I also use the Fulley app and its pretty close to what the dash is telling me.

Plan on getting it recalibrated when I bring it in for service. Thanks for the tip on the Fuelly app, appreciate it.

 

[Minty JL]

Stock 23 Rubicon 8at, 12.9 mpg but my drives are ~5 miles one way to work, and it's 4 stop signs on hills, and stop lights on hills.

Yeah I'm at 13.1

 

[ATX_Jeeper]

Yeah I'm at 13.1

Gas or Diesel?

 

[ATL_Rubi]

Gas or Diesel?

He's gas and so am I, i misread the thread title... Whoops lol

 

[HomebrewJT]

17 around town 4.56 gears and 40s

 

[ATX_Jeeper]

He's gas and so am I, i misread the thread title... Whoops lol

No worries. I updated the title of the thread as I thought folks might not see what section this is posted in.

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