No, you can't use water or pee. Def is 33% urea 66% deionized water. The urea breaks down in the heat of the exhaust to release ammonia. The ammonia reacts in the selective catalyst reduction section of the exhaust to convert NOX to nitrogen and water. You might be able to fool the low level warning with water, but eventually the system is going to detect elevated NOX levels and eventually derate speed. DEF fluid in the fuel tank is certain death to the fuel system. It's very corrosive to metal. One speck of rust is enough to stick an injector open or closed. Probably why they have a barrel of Def to get rid of is it's a perishable product. Stored over 90 degrees can cause it to degrade to the point it no longer controls NOX.
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Today's Featured Article - A Lifetime of Farm Machinery - by Joe Michaels. I am a mechanical engineer by profession, specializing in powerplant work. I worked as a machinist and engine erector, with time spent overseas. I have always had a love for machinery, and an appreciation for farming and farm machinery. I was born and raised in Brooklyn, New York. Not a place one would associate with farms or farm machinery. I credit my parents for instilling a lot of good values, a respect for learning, a knowledge of various skills and a little knowledge of farming in me, amo
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