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rhagfo

Portland, OR

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Posted: 11/26/20 03:31pm Link  |  Quote  |  Print  |  Notify Moderator

FishOnOne wrote:

rhagfo wrote:

Me Again wrote:

rhagfo wrote:

Cummins12V98 wrote:

15 RAM with gauge at 1/2 a 2.5 fits easily.


X2!


One has to use 1 to 1.5 gallons when the tank is full before the gauge even starts to move down. It is very slow at the top and more speedy on once the gauge starts moving.


While that may be true, at least Ram thought in give you a gauge. Ford and GM didn’t have them early on, and I am not sure if either has a gauge yet.


The 11-16 Super Duty's tells you "The exhaust system is OK", "under half full", and two different miles left warnings (don't remember the exact miles left messages). The '17-Up have a digital DEF gauge.

The Ram def usage rate is not linear and will go down at a faster rate once the fluid gets down to a certain level. Not sure if Ford or GM does the same.

I was a Ford man for about 45 years and most of my fuel gauges were not linear either. That and I could watch the file gauge needle move on our old 460 F250 ,twin 19 gallon tanks!


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noteven

Turtle Island

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Posted: 11/26/20 05:49pm Link  |  Quote  |  Print  |  Notify Moderator

Lantley wrote:

noteven wrote:

What we learned in the class 8 world is high EGT's (power demand) result in increased NOx emission which = increased DEF use. In a working class 8 truck that was around 1-2% DEF vs fuel.

If I owned a DEF using pickup I would measure in some DEF fills at the pumps vs fuel used and soon have a rate vs fuel use vs work we are doing today factor to know when to fill the DEF tank.
a shopping plaza or China parts store to buy DEF in a cardboard box down aisle 300.

In my case my DEF use is erratic because my truck is my daily driver. I'm not towing all the time.
Tying to calculate/predict my DEF use based on my driving habits is futile.
Just need a gauge!


Wanting a gauge for DEF is not unreasonable.

Me Again

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Posted: 11/27/20 08:02am Link  |  Quote  |  Print  |  Notify Moderator

FishOnOne wrote:



The Ram def usage rate is not linear and will go down at a faster rate once the fluid gets down to a certain level. Not sure if Ford or GM does the same.


Usage is linear, however the gauge is not! Those are separate issues. Like Russ said, it is nice that RAM gave "us" a gauge. I like having it, as it makes it easy to know when to look for a WM and put in a box of Peak Blue DEF. All has been Peak Blue DEF except of the last one which for WM Supertech Jug, and I am going to run it lower before adding another box. All has been from WM except one in Wells, Nv from Love's.


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tkcrawford

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Posted: 11/28/20 08:22am Link  |  Quote  |  Print  |  Notify Moderator

Just for giggles, I just now looked up the price of Peak Blue DEF on the Canadian Wal-Mart (walmart.ca) page. You're not gonna believe this...

For one gallon of Peak Blue DEF at Wal-Mart the price is $78.97 with a shipping fee of $169.05. Now don't you all feel better?!


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NJRVer

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Posted: 11/28/20 02:40pm Link  |  Quote  |  Print  |  Notify Moderator

I use Blue DEF from Walmart as a matter of convenience.
In the past month or so it seems like all of a sudden Home Depot and Lowes around me are on a massive Blue DEF push.

You used to see maybe 5 or 6 boxes in an out of the way location.
Now, pallets of the stuff right in your face as soon as you walk in the door in the contractor end of the stores. Prices are within cents of each other $12.25 - $12.50.

jaycocamprs

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Posted: 11/28/20 07:34pm Link  |  Quote  |  Print  |  Notify Moderator

ktmrfs wrote:


two ways
1) my truck gives an initial warning at 30% which even worst case is at least 1,000 miles. Then it continues to count down and give warnings. If I'm dumb enough to ignore the gauge for 1,000 miles I get what I deserve.
2) DEF usage is about 1 gallon of DEF for 100 gallons of diesel. pretty easy to keep track of in my head.
3) If I'm traveling, before I leave I can have a pretty good idea based on last fill how many miles I can go before the 30% warning comes on. If I think I will be close, easy enough to put a 2.5gallon jug in the bed.


You need to keep that LML. #1 I've never seen a warning of more than 300 miles. And the mileage given isn't right, it's short 20-25%. And #2 the L5P sucks DEF. The one time I kept track of the fuel for a whole tank of DEF worked out to about 1 gal DEF to 45 gal diesel. That's twice the rate of the LML.


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Lantley

Ellicott City, Maryland

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Posted: 11/28/20 07:45pm Link  |  Quote  |  Print  |  Notify Moderator

jaycocamprs wrote:

ktmrfs wrote:


two ways
1) my truck gives an initial warning at 30% which even worst case is at least 1,000 miles. Then it continues to count down and give warnings. If I'm dumb enough to ignore the gauge for 1,000 miles I get what I deserve.
2) DEF usage is about 1 gallon of DEF for 100 gallons of diesel. pretty easy to keep track of in my head.
3) If I'm traveling, before I leave I can have a pretty good idea based on last fill how many miles I can go before the 30% warning comes on. If I think I will be close, easy enough to put a 2.5gallon jug in the bed.


You need to keep that LML. #1 I've never seen a warning of more than 300 miles. And the mileage given isn't right, it's short 20-25%. And #2 the L5P sucks DEF. The one time I kept track of the fuel for a whole tank of DEF worked out to about 1 gal DEF to 45 gal diesel. That's twice the rate of the LML.

Exactly my L5P give some inaccurate warning mileage and threatens to go into limp mode! Good Grief! Sort of unbelievable that GM thought this was OK[emoticon]


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