Def Fluid LIfe
Hi all, My 2013 Duramax has been sitting in my garage since last Oct. Should I be worried about the DEF fluid degrading and possibly causing problems when I hit the road this month? Couldn't find ...
Forum Discussion
Searching_Ut wrote:
For my 2015 Ram, shelf life of the DEF doesn't seem to be an issue. The truck goes through it so fast there is no way it will ever get Old, especially when you don't want to fill the tank all the way in the winter because of freezing issues.
One good thing about the Rams is you don't have to worry about busting the def tank if you freeze a full tank of it. They have enough expansion room.
Fords otoh WILL bust the tank if full and it freezes hard.
Had a fleet of all big 3 diesels in the Arctic last year and the above theory was proven multiple times up there with daily hard freeze thaw cycles on the def for months on end.
