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disposing of expired DEF?

rickinAZ

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I have two 2.5 gallons of expired DEF that I need to get rid of. How do I responsibly do that? My first inclination, since it's just water/pee, is to dump it down the laundry room sink, but I'm hesitant.
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calemasters

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BlueDEF is a nontoxic solution of 67.5 percent purified water and 32.5 percent ultra-pure automotive-grade urea. It is synthetic urea. Blue Def says it also has their proprietary additive package.

Seems like worse stuff get flushed down the toilet every day. May want to call an automotive store in you area that takes used engine oil and see what they say.
 

Big_Lebowski

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Maybe dump it out on your driveway and let it evaporate.
 

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Drop it off at autozone
 

JoffeyJLUR

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Can the DEF in your tank expire?

I was planning on letting my tank get a little below half a tank and then just topping it off with a new 2.5 gallon jug.

Would that be a bad idea?
 

Mr. Curti

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Can the DEF in your tank expire?

I was planning on letting my tank get a little below half a tank and then just topping it off with a new 2.5 gallon jug.

Would that be a bad idea?
supposable it expires. And I don’t truly understand how or why. It’s water and fertilizer. As to is it better to run the tank low or put a jug in as needed, I have no clue. I’ve done both and probably don’t drive enough to see difference.
 

gerlbaum

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If there was a legitimate concern the engineers would have put it in the manual. That doesn’t mean engineers are infallible, but they right 99% of the time.
 
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rickinAZ

rickinAZ

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Can the DEF in your tank expire?

I was planning on letting my tank get a little below half a tank and then just topping it off with a new 2.5 gallon jug.

Would that be a bad idea?
Since heat is it’s enemy, I’m assuming that DEF in the tank, especially in AZ-like climates, goes bad quicker than the jugs stored in A/C. I only drive 6K miles per year - that's about a tanks-worth, but it's living at well over 100° for a substantial portion of the year.

I'm going to run half-full from here on in.
 
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rickinAZ

rickinAZ

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I sent an email to BLUEDEF. I'll share their response if I get one. I suspect their lawyers will say something like: "be sure to dispose of properly at an appropriate facility" (or some such obscure corporate-speak).
 

grimmjeeper

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If there was a legitimate concern the engineers would have put it in the manual. That doesn’t mean engineers are infallible, but they right 99% of the time.
You've never tried to design something that the marketing department is in charge of, have you?
 
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rickinAZ

rickinAZ

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Just buy a new jug and take the old one back the next day with the new receipt.
The devil in me likes the idea, but I'd be passing-the-trash to the next unsuspecting diesel owner - which violates the Golden Rule. :)
 

Abramovich

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Here is what Victory Blue (DEF manufacturer) has to say about degradation. I don't think that we have to be concerned.

Diesel Exhaust Fluid doesn’t degrade nearly as quickly as people assume. For example, at 86°F, DEF has a shelf life of a year. REMEMBER: Do not equate shelf life to spoiling like food, as DEF will not go bad. It will lose some effectiveness, and the SCR will dose at a higher rate, but it won’t “go bad.” If maintained at a constant temperature, DEF manages to stay for several months. For example, at 74°F in Los Angeles, Diesel Exhaust Fluid has the shelf life of 44 months.
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