Originally Posted by NDEBT
You are getting ripped off. DEF all has to meet the same requirements in the US. The ford part # for 2.5 Gal is PM27J it is about $15.00 for 2 1/2 gallons. The blue is just dye.
My understanding is that standard DEF uses an oxidizing catalytic converter and particulate filter combined with zeolite. There are other Mercedes vehicles than can run on DEF (and MB sells their version DeNOx)...
Adblue on the other hand is urea based and works differently in its chemical reactions?
...that said, I could be totally wrong. I'm a systems engineer and know nothing about diesels other than owning a few of them and what I've been told/read.
I'd love to learn more about it (perhaps in another thread).