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bsmith0404 · 01-13-2019, 12:16 PM

They say Def is good for up to two years, I just wouldn’t recommend letting it get old. No reason to fill it if it’s going to last a year. Use smaller quantities and keep it fresh

01-13-2019, 12:16 PM	#34
bsmith0404 Senior Member Join Date: Mar 2014 Location: Las Cruces Posts: 4,665	They say Def is good for up to two years, I just wouldn’t recommend letting it get old. No reason to fill it if it’s going to last a year. Use smaller quantities and keep it fresh