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Diesel exhaust fluid is one of the key elements of the Selective Catalytic Reduction SCR process used by most medium and heavy-duty engine builders to meet EPA 2010 regulations. BlueDEF is a non-toxic solution of 67.5 percent purified water and 32.5 percent ultra pure automotive grade urea. BlueDEF is not a fuel or fuel additive.

Blue DEF Diesel Exhaust Fluid - 2.5 gallon

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Ensures that your diesel exhaust system runs smoothly to prevent incredibly expensive repairs. Engineered for use in Selective Catalytic Reduction

MWC DEF Diesel Exhaust Fluid 2.5 Gallon