Don't risk damaging your fuel system with a poor-quality fuel additive! Power Service Diesel 911 Diesel Fuel Treatment is a winter rescue formula designed to solve your diesel fuel emergencies during the cold winter months. Diesel 911 and Diesel Fuel Supplement +Cetane Boost are compatible with diesel fuel and may be used at the same time. This Diesel fuel treatment de-ices frozen fuel filters, re-liquefies gelled fuel, prevents fuel filter icing, and removes water from your fuel system. The Power Service diesel fuel treatment also contains a SLICK DIESEL lubricator to maximize fuel lubrication and protect pumps and injectors from accelerated wear. Diesel 911 does not prevent fuel gelling � use Diesel Fuel Supplement +Cetane Boost as a preventive measure to keep fuel from gelling.