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 > Ram 2500 DEF fluid

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samhain7

Toronto

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Posted: 11/19/20 06:24am Link  |  Quote  |  Print  |  Notify Moderator

Hi all
I am on tank of gas # 6 on my new to me truck and thrnDEF fluid gage has barely even moved

How long do you get on a tank of DEF fluid and how big is the reservoir?

Thanks


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RobWNY

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Posted: 11/19/20 06:40am Link  |  Quote  |  Print  |  Notify Moderator

It varies. You will use more when towing than when not towing. It also makes a difference in how big the DEF tank is. My understanding is to expect around 1000 miles for each gallon of DEF when not towing.


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Lynnmor

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Posted: 11/19/20 06:41am Link  |  Quote  |  Print  |  Notify Moderator

Your gas truck will run forever without filling the DEF tank. [emoticon]

The answer to your question is in the owners manual.





Cummins12V98

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Posted: 11/19/20 07:07am Link  |  Quote  |  Print  |  Notify Moderator

samhain7 wrote:

Hi all
I am on tank of gas # 6 on my new to me truck and thrnDEF fluid gage has barely even moved

How long do you get on a tank of DEF fluid and how big is the reservoir?

Thanks


Your problem is you have been putting "GAS" in your Diesel Truck.


2015 RAM LongHorn 3500 Dually CrewCab 4X4 CUMMINS/AISIN RearAir 385HP/865TQ 4:10's
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spoon059

Just north of D.C.

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Posted: 11/19/20 07:15am Link  |  Quote  |  Print  |  Notify Moderator

The DEF gauge isn't linear. It will show full until its about half a tank, then it will quickly drop down towards empty. One day you will get a warning that DEF is low, that is usually when I fill up. If you don't fill up then, you'll eventually start getting messages saying 250 miles to shutdown, etc.

During the summer we take shorter trips, so I just dump 2.5 gallon jugs in when I get the low DEF warning. In the winter we take a long trip, so I usually fill the DEF at a pump, so I can fill the tank.


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Bionic Man

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Posted: 11/19/20 07:59am Link  |  Quote  |  Print  |  Notify Moderator

In theory, you should need DEF about the same time you need an oil change. But there are a LOT of variables to that.

Your DEF gauge is probably working just fine. You shouldn't need to fill after 6 tanks of fuel. According to Cummins, DEF consumption is 3% - 5% of your total fuel consumption.

The DEF tank on a 2016 2500 is 5.5 gallons.

* This post was edited 11/19/20 08:22am by Bionic Man *


2012 RAM 3500 Laramie Longhorn DRW CC 4x4 Max Tow, Cummins HO, 60 gallon RDS aux fuel tank, Reese 18k Elite hitch
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samhain7

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Posted: 11/19/20 08:22am Link  |  Quote  |  Print  |  Notify Moderator

Lynnmor wrote:

Your gas truck will run forever without filling the DEF tank. [emoticon]

The answer to your question is in the owners manual.


Gee, thanks for the help
[emoticon]

samhain7

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Posted: 11/19/20 08:24am Link  |  Quote  |  Print  |  Notify Moderator

Bionic Man wrote:

In theory, you should need DEF about the same time you need an oil change. But there are a LOT of variables to that.

Your DEF gauge is probably working just fine. You shouldn't need to fill after 6 tanks of fuel. According to Cummins, DEF consumption is 3% - 5% of your total fuel consumption.

The DEF tank on a 2016 2500 is 5.5 gallons.


Thanks Bionic man. Great information.
Yes, everything is on the net, but sometimes it is nicer to interact with people and listen to stories rather than just read a book.
Thanks for taking the time to respond.

kirkl

Washington

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Posted: 11/19/20 09:25am Link  |  Quote  |  Print  |  Notify Moderator

My Ram will go about 4000 miles and use half a tank of DEF if not towing so yes the guage will move slowly. Towing it will use more.


2017 Ram 2500 6.7 Cummins 4x4 LB
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Lynnmor

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Posted: 11/19/20 09:36am Link  |  Quote  |  Print  |  Notify Moderator

samhain7 wrote:

Lynnmor wrote:

Your gas truck will run forever without filling the DEF tank. [emoticon]

The answer to your question is in the owners manual.


Gee, thanks for the help
[emoticon]


You're welcome.
I just thought that I didn't want to sit and type up everything that you already have in your possession. [emoticon]

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