Is All DEF Created Equal?

[Tobin]

Can't believe I am asking this but I need to add DEF to my truck soon. Is all DEF the same or is one brand better than the other?

 

[Begle1]

This question makes me feel dirty.
Random internet query so I'm not totally useless:
5 Best Diesel Exhaust Fluids - June 2021 - BestReviews (Who writes this stuff?)

 

[sootie]

its all the same.

 

[mhuggler]

Can't believe I am asking this but I need to add DEF to my truck soon. Is all DEF the same or is one brand better than the other?

I test DEF in customer’s equipment and storage tanks pretty often. The brand doesn’t matter as the ammonia content has been standardized. It’s all about the storage; it needs to be kept cool and dark. UV rays destroy DEF fairly quick.

 

[Tobin]

Thanks, I'll try and find some place with a high turnover that hasn't been sitting around.

 

[Signature600]

I test DEF in customer’s equipment and storage tanks pretty often. The brand doesn’t matter as the ammonia content has been standardized. It’s all about the storage; it needs to be kept cool and dark. UV rays destroy DEF fairly quick.

This. I have been selling DEF since 2008 when our tractors went to it...not a big deal, as long as it's kept out of the sun. I have even had customers use DEF that is 3 years old, but was stored in a dark corner of a heated building, and it gave them zero problems.

It's all about the concentration, and you have to remember that 67.5% of it is water, and can evaporate.
Chris

 

[Ram12vcummins]

Some distilled water with the def will help
Clean the injector as well.