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 - Gettin My Old Tractor Home - by Clayton Sweeney. My name is Clayton Sweeney. I am from Southern Maryland in a small town called Lothian. I am 20 and my father and I are the proud owner of a 1954 Allis Chalmers WD-45. When I was 18, I dated a girl in the next county over. Her family are tobacco farmers. It was a cold Thanksgiving evening, and we were going up to her Grandparents house. As we passed one of their barns, I noticed something orange in the corner of my eye in this old shed. It was pretty dark and I asked what it was
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1965 International Harvester McCormick Farmall cub tractor 2,500. Two owner tractor. My grandfather bought new in 1966, then we inherited it. Have all the paperwork original manual and all maintenance records. It starts and moves. Comes with underbelly mower, plough, and some other attachments.
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