Ultra Premium Diesel Exhaust Fluid

This high-purity Harvest King Ultra Premium Diesel Exhaust Fluid 2.5 GAL goes through six different stages of water filtration and is a carefully balanced solution of urea and deionized water, enhanced with a proprietary additive package designed to protect your engine’s emissions system. When DEF is injected into the exhaust stream, it converts harmful nitrogen oxides (NOx) into harmless nitrogen and water vapor — helping diesel engines meet strict emissions regulations. But beyond basic compliance like a standard DEF in the market, this DEF goes further. Harvest King DEFense™ technology cleans and actively prevents the buildup of harmful crystal deposits in the Selective Catalytic Reduction (SCR) system. These deposits can lead to increased fuel consumption, reduced engine power, and expensive repairs. By keeping the system clean, this DEF helps maintain optimal engine performance and fuel economy. Whether you're managing a fleet or maintaining a single diesel vehicle, this ultra premium DEF delivers long-term value through cleaner operation, extended system life, and reduced downtime and maintenance costs.