DEF in diesel SCR systems.

tinner12002 wrote:

mpfireman wrote:
Modern diesel engines require the use of DEF fluid to meet the clean air standards. I tow with a 98.6 Dodge Cummins powered truck, thus no DEF is necessary. But those who have the newer versions of Diesel engines, I think after 2006 or 2007 need this DEF fluid. Reading the April 2016 issue of Trailer Life, there is an issue on the limited life of this DEF fluid. This fluid can degrade over time and is less effective, and may even cause trouble codes to illuminate your CHECK ENGINE light. The approximate shelf life is 36 months at 50 degrees F
18 months at 77 degrees F
12 Months at 86 degrees F
6 Months at 95 Degrees F
2 Months at 104 Degrees

Side note, DEF fluid will freeze at 12 Degrees F

I was one who was on the non def side of the fence but after seeing and hearing the reports for a couple years and feeling much more relaxed about its use, I'm on the def side now and very happy with my current truck.

mpfireman wrote:
Modern diesel engines require the use of DEF fluid to meet the clean air standards. I tow with a 98.6 Dodge Cummins powered truck, thus no DEF is necessary. But those who have the newer versions of Diesel engines, I think after 2006 or 2007 need this DEF fluid. Reading the April 2016 issue of Trailer Life, there is an issue on the limited life of this DEF fluid. This fluid can degrade over time and is less effective, and may even cause trouble codes to illuminate your CHECK ENGINE light. The approximate shelf life is 36 months at 50 degrees F
18 months at 77 degrees F
12 Months at 86 degrees F
6 Months at 95 Degrees F
2 Months at 104 Degrees

Side note, DEF fluid will freeze at 12 Degrees F

nevadanick wrote:
Wildebill, all modern diesel vehicles using DEF have a DPF as well.

broark01 wrote:

RedRocket204 wrote:
Do you have a question? If not, what is your point?

Many, many threads about the paranoia of DEF and virtually none of those threads have proven the paranoia is justified.

Yes, I own a modern diesel that uses DEF and it has NEVER been an issue.

I would call it informational, didn't know there had to be a point or a question.

The only DEF problem I ever experienced was when it was poured into my diesel tank.

OP wrote:
98.6 Dodge Cummins powered truck, thus no DEF is necessary

hooligan wrote:

broark01 wrote:


The only DEF problem I ever experienced was when it was poured into my diesel tank.

You might find this interesting.. DEF in Diesel fuel tank

broark01 wrote:


The only DEF problem I ever experienced was when it was poured into my diesel tank.

RedRocket204 wrote:
Do you have a question? If not, what is your point?

Many, many threads about the paranoia of DEF and virtually none of those threads have proven the paranoia is justified.

Yes, I own a modern diesel that uses DEF and it has NEVER been an issue.

TucsonJim wrote:

Walaby wrote:
I purchased a Ram 2500 diesel in Jan. It's a daily driver, plus TT hauler. So, far, I've driven it daily for two months, and 4 (or maybe 5) tanks of gas, and still have just over a half tank of DEF. I don't forsee the need to store def. I'll buy a 2.5 gal, and fill it up before my trip to Florida.

Mike

Mike - If you'll be pulling your rig when you head to Fla, plan on using more DEF than when you're driving around town. I know when I'm towing, I use quite a bit more than when I'm not. But it's really not a big issue because you can buy DEF most anywhere now.

Jim