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
Learjet wrote:Cummins12V98 wrote:
If stored in a cool place it’s most likely fine. Personally I would not use it. I on
only buy what I need.
Wow! took several responses before someone mentioned the most important thing....what was the temperature it was stored....that is the most important factor.
Johnny, tell us what I won???!!!
