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 ??
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.