When does DEF fluid go bad.
Due to unforeseen circumstances, I've had DEF fluid in my rv system for about a year now because the rv hasn't been driven and may sit for a few more months. When do I start to worry and have to drain...
Forum Discussion
Hi,
I'm not an expert by any measure on diesels, but I found this link on Commonly Asked Questions About DEF.
Wow...I just learned a ton of stuff about DEF! LOL
This is probably most relevant to your situation from that link: "If stored between 10 and 90 deg F, shelf life will easily be one year. If the maximum temperature does not exceed approximately 75 deg F for an extended period of time, the shelf life will be two years."
No "easy" answer, as it depends upon the temperature, but it looks like you could be nearing the expiration point if you have many days above 90 degrees F.
I hope this helps.
~Rick
I'm not an expert by any measure on diesels, but I found this link on Commonly Asked Questions About DEF.
Wow...I just learned a ton of stuff about DEF! LOL
This is probably most relevant to your situation from that link: "If stored between 10 and 90 deg F, shelf life will easily be one year. If the maximum temperature does not exceed approximately 75 deg F for an extended period of time, the shelf life will be two years."
No "easy" answer, as it depends upon the temperature, but it looks like you could be nearing the expiration point if you have many days above 90 degrees F.
I hope this helps.
~Rick
