Blue DEF

Been using WM DEF since '15 and no issues. Just make sure the seal hasn't been tampered with as was mentioned above

I had a 2011 Duramax that I put 115K on and used the cheap stuff, I.E. Walmart Brand most of the time. Only DEF issue was with the two original defective NOx sensors.

Frank55 wrote:
I bought the cheap stuff...once...check engine light came on, said it was a DEF issue. Used the Blue, after about 2-3 tanks of fuel, the CEL went away, no problems in 50,000 miles.

It would be nice to know what truck and what the trouble code was so that we might learn something.

I bought the cheap stuff...once...check engine light came on, said it was a DEF issue. Used the Blue, after about 2-3 tanks of fuel, the CEL went away, no problems in 50,000 miles.

2oldman wrote:
Blue is fine for pulling a 5th wheel.

As well as for *not* pulling anything.

As to which one *might* be better (excluding "use by" date), go to
any of the various (by brand) diesel forums and check opinions.
(Get the "scoop" from owners of *your* brand - and decide if you like what they say).)

Besides self, you may find someone with a Chem major who cares -or-
one of the forums may have done an extensive study - as one of 'em did for diesel fuel additives "long ago"!...:W

~

I think some people just feel better paying more for something, so I say good for them.

sayoung wrote:
LOL, 3 pages discussing chicken whiz. For the experts, do you get better def from a Rhode Island Red , a Plymouth Rock , or a Leghorn ?

Uh, that would have to be a milking chicken, right???



:):)

LOL, 3 pages discussing chicken whiz. For the experts, do you get better def from a Rhode Island Red , a Plymouth Rock , or a Leghorn ?

Just because something costs more money does not mean it is better. Pricing strategy is very complex and rarely has anything to do with manufacturing costs by themselves. It is all about a marketing strategy to maximize profits. That is why there are so many government regulations, testing labs, and competition. Blue Def, Walmart, and many other reputable brands meet the proper certifications and testing. So it is foolish to pay a higher price for that product. This is a guide that some companies use for pricing. Companies are in business to make a profit and do what they have to do to do that. https://quickbooks.intuit.com/r/pricing-strategy/6-different-pricing-strategies-which-is-right-for-your-business/

rhagfo wrote:

Lynnmor wrote:
DEF is DEF, buy whatever has the lowest price. I do have concerns with dirty nozzles at truck stops, but many use it with no problems. Walmart most likely has the best price on their own brand.

agesilaus wrote:
As noted DEF is DEF is DEF. It is all the same, save yourself some money and buy the $7 stuff from Walmart.

So you are both certified chemist that have tested all brands of DEF on all counts including purity.

The effects of less pure DEF likely will not appear right away, the same as using cheap engine oil will only build sludge which leads to issues down the road.
As often as I need to add DEF I will use a brand name.

Today, cars and trucks and other applications using diesel engines sold in the United States must meet stringent U.S. Environmental Protection Agency (EPA) emissions requirements. To meet these requirements, many diesel engine manufacturers use Selective Catalytic Reduction (SCR), an emissions aftertreatment technology that converts nitrogen oxides (NOx) in the diesel-engine exhaust stream into nitrogen and water vapor, two natural components in the air we breathe.

Diesel exhaust fluid (also referred to as DEF or AUS 32) is injected into the diesel exhaust stream and the heat from the exhaust, the fluid, and a catalyst convert the NOx into the harmless gases.

Diesel exhaust fluid is a 32.5% solution of technically pure urea in purified water. For the SCR unit to operate properly, the DEF must meet an exacting purity standard. This standard, published by the International Organization for Standardization (ISO), is intended to ensure that the diesel exhaust fluid used in SCR-equipped cars and trucks provides the purity required by diesel engine manufacturers and the quality to preserve the emissions control system and the environment.

The API Diesel Exhaust Fluid (DEF) Certification Program is a voluntary program designed to certify and monitor the quality characteristics of diesel exhaust fluid intended for use in motor vehicles with diesel engines. Diesel exhaust fluid marketers that have demonstrated that their products satisfy the requirements of the most recent and applicable edition of ISO 22241, Diesel engines – NOx reduction agent AUS 32, may be licensed to display the API Diesel Exhaust Fluid Certification Mark.

API Diesel Exhaust Fluid Certification has many benefits:

Identifies for consumers diesel exhaust fluids that meet diesel engine manufacturer requirements.
Helps consumers find those fluids.
Gives consumers a choice of quality brands from which to choose.
Helps reduce Nitrogen Oxide emissions.
Provides rigorous monitoring of fluids in the marketplace.
Tests licensed fluids to ensure that they meet program requirements.
A complete list of licensees is available on our Licensee Directory.

Please download the Diesel Exhaust Fluid Program Overview for additional information and program requirements.

Please direct any questions or comments regarding licensing to apidef@api.org