Diesel 911 is a product for emergency use in winter. This winter rescue formula liquefies gelled fuel and frozen fuel filters to restore the flow of diesel fuel to an engine. Diesel 911 does not prevent fuel from gelling: use Diesel Fuel Supplement +Cetane Boost (in the white bottle) as a preventative measure to prevent fuel from gelling. Diesel 911 and Diesel Fuel Supplement +Cetane Boost are compatible with diesel fuel and can be used at the same time.
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