Is DEF fluid made from pig urine?

Is DEF fluid made from pig urine?

But despite DEF earning the nickname “pig urine,” Diesel Exhaust Fluid is actually made of commercial-grade urea—synthetic ammonia and carbon. So, to simplify things: the urea and water in DEF heat up, producing ammonia. This ammonia then breaks down and neutralizes the NOx gases. Nov 28, 2018