DEF how old is too old?
I have an opened jug of DEF dated July 2019. Can't tell if that is a manufactured date or an expiration date. Any ideas? Or should I just breakdown, dump it and buy a fresh jug?
Forum Discussion
DEF's shelf life varies by temperature:
<50 deg, ~36 mo.
50-77 deg, ~18 mo.
78-86 deg, ~12 mo.
87-95 ~6 mo.
96-104 ~2 mo.
If you live in southern AZ probably should refill with limited amounts of DEF unless you drive a lot.
<50 deg, ~36 mo.
50-77 deg, ~18 mo.
78-86 deg, ~12 mo.
87-95 ~6 mo.
96-104 ~2 mo.
If you live in southern AZ probably should refill with limited amounts of DEF unless you drive a lot.
