DEF consumption In Dodge Ram

[DelCamper]

I just bought a 2014 Dodge Ram 3500 long bed Single Rear Tire diesel and wasn't told about DEF.

How much of this stuff do you go through? Roughly in relationship to a tank of diesel how often am I filling this DEF tank?

[donn0128]

Most of them are designed to last about the same as oil changes.
I have a hard time understanding your not knowing about diesel emission systems with all the talk about DEF in the last couple of years. Where have you been?