DEF is an acronym for Diesel Exhaust Fluid. Its purpose is to reduce harmful tailpipe emissions that are produced by a running diesel engine. Without DEF, diesel exhaust gases can be very harmful to the environment. DEF is technically a combination of urea and deionized water. ...
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DEF, of course, stands for diesel exhaust fluid. Unfortunately, North American governments have been “DEF” to the problems it has created. Manufacturers, dealers, trucking companies large and small, and drivers have all been affected. Those who know me know environmental concerns are high on m...