Developed for all diesel engines equipped with Selective Catalytic Reduction system, Prestone Command™ DEF is a colorless, odorless, non-toxic, and non-flammable liquid solution consisting of 67.5% demineralized water and 32.5% automotive-grade urea. SCR emission-control technology injects precise amount of DEF into diesel-powered vehicle’s exhaust stream, which converts NOx into harmless nitrogen and water vapor. Prestone Command™ DEF meets all API and ISO 2224-1 manufacturing specifications.
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