DEF for new truck

[tradosaurus]

Unless I absolutely had to I would avoid any diesel truck that took DEF. I was so happy when I deleted the emissions of my, now sold, 2014 F250. If I had to buy a truck now it would be either a gas or diesel truck that's been deleted.

 

[Hay Dude]

Oh boyyy, another DEF/SCR debate thread? yay, haha.

Oosik - congrats on the new truck! Post some pics, man.

Yeah, you really kicked ass on the last one….

“Reliable and Robust” seems to come to memory.

 

[deezler]

I don’t think it is. I buy the WalMart brand. Cheap. $9.99/2.5G.
Made in USA.
Never had a problem in 6 years and 73,000 miles.

 

[D&D]

View attachment 4846631
ref: https://static.nhtsa.gov/odi/tsbs/2013/SB-10051649-7535.pdf

Yea, they don’t stay full very long for us

 

[Shawn T. W.]

The two def jugs I have here that I haven't reused for water containers both have the 2 in a triangle on the bottom, HDPE ... that tells me they are recyclable ...

This is the style that comes in a box, and is quite wimpy plastic ...

This one is sold off the shelf ...

 

[92blacksunshine]

View attachment 4846631
ref: https://static.nhtsa.gov/odi/tsbs/2013/SB-10051649-7535.pdf

This sounds a little contradictory (from the linked pdf...)

Disposal:
If spillage occurs, the diesel exhaust fluid should be either transferred into a suitable container, or covered
using an absorbent material and then disposed of according to local environmental regulations. The container
must be labeled correctly. ï Do not empty into the drainage system. ï Do not empty/release into surface water.

DOESN'T SOUND TOO NON-POLLUTING...

 

[BigBlue1]

Please explain. The engine "inhaled" the same amount of air it "exhaled", so how did it add air mass?

It converted some components of the air to other components. The net difference between intake total mass (air and fuel) and output (exhaust) should be essentially net 0 but when the carbon in the diesel combines with the oxygen in the air to produce CO2 then the net 'gain' of CO2 goes from almost zero to whatever the resulting mass is. And that's what they count. So, total mass doesn't change (much) but mass of "bad stuff" changes.

And though it is weird to think that they measure these things in pounds and get those huge numbers that are so much larger than the weight of the fuel going in, there is actually a LARGE mass of air used during combustion and that air has a weight to it. Essentially it is taking the volume of air in a room 13'x13'x8' high to burn each gallon.

One gallon of diesel combines with about 1300 cubic feet of air during combustion. That 1300 cu ft actually weighs 98 pounds. So you have 98# of air and 6# of diesel combusting to get probably about 104# of byproduct, some water, some CO, some CO2, some other gasses. That's how you can end up with 22-25# of CO2 from burning a gallon of diesel. Chemistry and fluid dynamics (of which air is part) can be kinda hard to think about.

Don't believe me or don't buy it? Ask some questions of your favorite AI chatbot and see what it says.

 

[BigBlue1]

Air weighs ~0.0807 lbs. per cubic foot; CO2 would weigh the same + combustion remains. Got it.
That equates to a diesel engine intake of 272.6 cubic feet of air to burn 1G of diesel fuel.
The typical compression/diesel engine air to fuel ratio, under load, is 14/1, at idle can be 70/1.

Not sure where you got the 272 cu ft amount from, but it isn't what I found. I found my info here:

Run Tractors and Other Diesel Engines at Peak Performance

Achieving (and maintaining) peak performance of your engines will result in many benefits such as high fuel efficiency, reduced maintenance expenses, reduced downtime, and extended life.

extension.psu.edu

Where it says 1300 cu ft per gallon of diesel.

 

[deezler]

This sounds a little contradictory (from the linked pdf...)

View attachment 4858270



DOESN'T SOUND TOO NON-POLLUTING...

Yeah, you definitely don't want to spill the stuff. It wont kill you to touch it, or really harm the ecosystem if you spill just a little, but on your garage floor or equipment in the shop, it is nasty.

 

[Topzide]

Urea in the DEF is a base used in fertilizer. That's why it get that white crusty look when it dries. People use old DEF on there lawns to help with nitrogen absorption.

 

[Shawn T. W.]

That's why I don't mind using them for water jugs for my trees, don't gotta be spic&span clean!

 

[tuffy1]

My new truck ( Ram 3500 ) is diesel. So - DEF is also in the picture. However - there is SUCH a wide range of prices between different brands. Examples ...... Kleen DEF - $56/ 2.5 gal. Blue DEF - $17/ 2.5 gal. For those of you, in the know. Is this price difference justified?

My new truck ( Ram 3500 ) is diesel. So - DEF is also in the picture. However - there is SUCH a wide range of prices between different brands. Examples ...... Kleen DEF - $56/ 2.5 gal. Blue DEF - $17/ 2.5 gal. For those of you, in the know. Is this price difference justified?

I Have been buying and using DEF from Runnings at $7 to $9 for 2.5 Gals. Never had a problem in my 2019 F150 Turbo 3.0L Powerstroke. Just remember DEF has a shelf life. I have my DEF stored in the garage (not climate controlled). Based on the info. below, that I just looked up, I 'm going move it to a cooler place.

Average Temperature Est. Shelf Life
Below 50deg F 36 months
Below 77deg F 18-24 Months
86deg F 12 Months
95deg F 6 months
Over 104deg F 2 Months or Less

Do an AI lookup for DEF facts for more info.

 

[outdoorsman123]

I use stuff from the pump . There ain't much to the stuff at the end. And if you get yours from a truck stop or somewhere that sells a lot of diesel, the def won't be that old either as all the new trucks use a lot of it. I've been using the pump stuff for several years without a problem.
It's half the price and if you put a lot of miles on your truck the savings adds up.
If you don't drive much then a couple of jugs might not be a big deal to spend the extra on.
Seems many aren't aware of def at the pump option.

 

[deserteagle71]

Seems many aren't aware of def at the pump option.

Probably because they don't fuel at the pumps the big rigs use. I've yet to see a diesel/DEF pump in the section where autos and pickups fuel. I've been a diesel pickup owner for many many years and not once have I fueled with the big rigs.

 

[RayIN]

Not sure where you got the 272 cu ft amount from, but it isn't what I found. I found my info here:

Run Tractors and Other Diesel Engines at Peak Performance

Achieving (and maintaining) peak performance of your engines will result in many benefits such as high fuel efficiency, reduced maintenance expenses, reduced downtime, and extended life.

extension.psu.edu

Where it says 1300 cu ft per gallon of diesel.

I did ask chatbox, this is the result:

This confirms the AI stuff:

A Brief Introduction to Air-Fuel Ratio in a Diesel Truck

Your diesel truck’s efficient performance depends on the air-fuel ratio. Learn more about its impact and how to optimize it for better power and fuel economy.

blessedperformance.com

and,

Air fuel ratio – x-engineer.org

Tutorial on what is the air-fuel mixture, stoichiometric ratio and its influence on the performance of an internal combustion engine

x-engineer.org

 

[Too many Kubotas]

I've been a diesel pickup owner for many many years and not once have I fueled with the big rigs.

Same here for the very most part. Unless the truck lanes look empty I stick with the car pumps, with up to a 38' trailer and all.

The professionals generally need to get where they're going more urgently than I do, so I don't want to be in their way.

 

[RayIN]

This sounds a little contradictory (from the linked pdf...)

View attachment 4858270



DOESN'T SOUND TOO NON-POLLUTING...

What can i say_you see who published the data.

 

[4570Man]

Probably because they don't fuel at the pumps the big rigs use. I've yet to see a diesel/DEF pump in the section where autos and pickups fuel. I've been a diesel pickup owner for many many years and not once have I fueled with the big rigs.

My flatbed struggles to take fuel as fast as they put out otherwise I’d fill up there all the time. It takes forever to fill up my 50+ gallon tank with the regular pumps. Buc-ees has def at the regular pumps which is where I buy it

 

[92blacksunshine]

Probably because they don't fuel at the pumps the big rigs use. I've yet to see a diesel/DEF pump in the section where autos and pickups fuel. I've been a diesel pickup owner for many many years and not once have I fueled with the big rigs.

I use the truck lanes to fill up any chance I get, especially when towing the 5th wheel. I have a fleet card for RV'ers and it takes less than 2 minutes to fill up my Superduty with the monster nozzles. The truckers have been pretty friendly to me, I get in and get out quickly. The truckers do, on the other hand, like to pump their fuel and then go into the store leaving their trucks blocking the pumps...

 

[TractorGunn]

Probably because they don't fuel at the pumps the big rigs use. I've yet to see a diesel/DEF pump in the section where autos and pickups fuel. I've been a diesel pickup owner for many many years and not once have I fueled with the big rigs.

I pull my truck right up to the pumps they use. The diesel pumps way faster and the DEF is about half the cost.