DEF Blue Adding
Just wondered whether a person might "top off" the DEF tank instead of waiting for the warning stuff to light up and mess with my comfort level? Does it hurt anything to do this?
Forum Discussion
I guess I differ from most here. I know that DEF has a shelf life and degrades over time. I feel like if I keep toping it off that the DEF in the tank will slowly degrade. I run the tank down pretty low before refilling with fresh fluid.
