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
Dump it. Def has a shelf life. If it's stored in a cool place out of sun it's good for 12 months. If it's stored in direct sunlight then 3 months.
The key is in how it's stored.
The key is in how it's stored.
