Power Service Diesel de-ices frozen fuel-filters, re-liquefies gelled fuel, prevents fuel-filter icing, removes water from fuel system and extends the life of fuel-filters. This specialized formula contains Slickdiesel Lubricator for maximum lubrication of fuel-injection pumps and fuel injectors which protects against accelerated wear. Power Service Diesel 911 is effective in all diesel fuels, including Ultra Low Sulfur Diesel (ULSD) and biodiesel blends containing up to 20% biodiesel (B20). It can also be introduced early in the cold weather season to remove the build-up of water and condensation in the fuel system. As the name implies "Diesel 911", this is a product for emergency use and should not be used in place off a premium winter fuel anti-gel. For a premium fuel anti-gel to use over the entire cold season, use Power Service Diesel Fuel Supplement.