CISSP-ISSAP: Information Systems Security Architecture Professional

Gasoline and oil fires are Class B flammable-liquid fires. Carbon dioxide suppresses these fires by displacing oxygen, and Halon suppresses combustion through chemical inhibition. Historical fire-extinguisher compatibility guidance also lists soda-acid extinguishers for flammable liquids such as gasoline and oils. Water is unsuitable because it can spread a burning flammable liquid.