[c214dick]

Originally Posted by Joe in Texas

Just purchased a 2019 RAM 2500 diesel.... replace the 2005 RAM


I am new to DEF....
how big is my DEF tank?
How often do I refill the tank?
I bulk from gas station pumps or the 2 1/2 bottles from auto supply stores?
The auto store label brand or the national label brands ??

THANKS

I’ll let the more experienced answer this but..
Watch the expiration date on the 2 1/2 gal containers. My understanding is there’s a one year shelf life.