Auctionguyyy Junior Member Messages 135 Dec 24, 2013 #1 Does DEF (Diesel Exhaust Fluid ) expand enough in the winter that you need to take your pumps inside at least. I know it freezes at some point, but well below zero.
Does DEF (Diesel Exhaust Fluid ) expand enough in the winter that you need to take your pumps inside at least. I know it freezes at some point, but well below zero.