What does ''DEF'' mean? (Freightliner Cascadia)

[Ghost -_-]

Sorry I don't know anything about trucks but what does DEF mean and what does it do?

[RGH]

https://en.wikipedia.org/wiki/Diesel_exhaust_fluid

[Ghost -_-]

Thank you.

[Duck from State Farm]

Originally posted by CSI48:

D.E.F. :

Diesel exhaust fluid (DEF; also known as AUS 32 and marketed as AdBlue) is a liquid used to reduce the amount of air pollution created by a diesel engine. 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.

interesting, It's always good to learn a new thing you don't know about.

[Ghost -_-]

Thanks guys. Very helpful.