What is Def and how does it work?

Specifically, DEF is an aqueous urea solution made with 32.5% urea and 67.5% deionized water. DEF is consumed in selective catalytic reduction (SCR) that lowers the concentration of nitrogen oxides (NO x) in the diesel exhaust emissions from a diesel engine.

How much does Def cost?

The website, “Oilmen Truck Tanks” has compiled a list of 13 major manufactures. DEF is found at most major truck stops, auto parts stores and convenience stores for roughly $2-$3 per gallon. 18. How can you determine the age of a container of DEF?

Where can I buy Def fluid?

There are many manufacturers of DEF Fluid. The website, “Oilmen Truck Tanks” has compiled a list of 13 major manufactures. DEF is found at most major truck stops, auto parts stores and convenience stores for roughly $2-$3 per gallon.

What is the history of Def?

The active ingredient in DEF, urea, has been chemically synthesized since 1828 first by German scientist Friedrich Wöhler after treating silver cyanate with ammonium chloride. Urea was first discovered in urine by Dutch chemist Herman Boerhaave in 1727.