Schaeffer's Diesel Treat 2000 Ultra Low Sulfur Winter fuel additive is specially formulated to provide ultra low sulfur diesel fuel maximum cold temperature protection against fuel gelling, waxing and fuel line freeze-up. Diesel Treat 2000 contains highly concentrated, multi-functional additive package blended with our proprietary SynShield formula. This unique blend disperses existing injector clogging and plugging, and provides super keep clean performance throughout the entire system. SynShield surpasses industry standards for fuel lubricity and emissions and provides extra protection against fuel system wear and injector scoring. Diesel Treat 2000 can be used in all types of diesel fuel including low sulfur diesel fuel and biodiesel blends. Schaeffer's premium winter fuel additive meets DW10 specifications.