Wiredawg
TDR MEMBER
With the range one tank provides I see no reason to ever buy a jug without some sort of emergency.
Not so much based upon range... everyone has their methods. When I bought my 2017 Ram 5500, I asked my dealer service writer of 20 years if he had any advice about a DEF truck. He said keep the tank topped off. I do. So on my 5500, I add 2.5 gallons at close to the half mark on a 9 gallon tank. Not worth the effort to go to a truck stop when I can pick up fresh DEF at Walmart. RV is mostly filled at truck stops, bu occasionally gets a jug.
Cheers, Ron