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Fuel question

Sp0okfish

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I got 150 gallons of diesel for free because it has been mixed with only 1-2 gallons of DEF, was wandering if it would hurt anything to burn it I have a water seperater fuel filter so I think I should be alright. Just want other people two cents to be safe.
 

doghead

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Fluid, not fuel.

I was hoping the OP would confirm what he was talking about, rather than assume.
 

BIG_RED

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DEF has water in it:

"Diesel Exhaust Fluid, also called DEF, is a solution made up of purified water and 32.5 percent automotive-grade urea that is used as a carrying agent for the ammonia needed to reduce nitrogen oxide (NOx) emissions from vehicles into nitrogen, water and carbon dioxide (CO2)."

Quoted from: Diesel Exhaust Fluid | Facts About SCR

You do not want water in your fuel. Maybe if you got someone to run it through a centrifuge first, but then I don't know if that would get rid of the other chemicals (UREA) which are supposed to be fairly corrosive.
 

Ferroequinologist

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DEF=PEE

I would get a transfer pump and put a water seperator on that, rather than hope just the stock filter catches it. It might do it, but could leave you on the side of the road, at night, on a back road, needing to be somewhere quickly.2cents
 

Keith_J

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It settles out of diesel. It may form a scum with biodiesel so you would be best served to mix 1/2% two stroke oil into the diesel once decanted off the DEF.

The rest will be caught by the filters so drain them often into a clear jar to see if there is contamination.
 
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