DEF Treatment/ Rislone

[Yankee1019]

I'm pretty sure that's the opposite of fresh, right? With that approach you're always diluting the old DEF by 50% versus replacing most of it with fresh if you just wait until it's nearly empty.

DEF has a usable shelf life of about a year so as long as your able to cycle through maybe two full-tanks worth a year doing 50% fills should be fine. I wouldn't by several DEF jugs at time though. Only buy what you need at the time and don't buy DEF that looks like it's been on the store shelf for months.

Sponsored

 

[Ratbert]

Only buy what you need at the time and don't buy DEF that looks like it's been on the store shelf for months.

I don't buy DEF jugs. It's so much easier, cheaper, and significantly fresher to simply fill up at a truck stop.