Antiknock agent

Agent used to increase a fuel's octane rating / From Wikipedia, the free encyclopedia

Dear Wikiwand AI, let's keep it short by simply answering these key questions:

Can you list the top facts and stats about Antiknock agent?

Summarize this article for a 10 years old


An antiknock agent is a gasoline additive used to reduce engine knocking and increase the fuel's octane rating by raising the temperature and pressure at which auto-ignition occurs. The mixture known as gasoline or petrol, when used in high compression internal combustion engines, has a tendency to knock (also called "pinging" or "pinking") and/or to ignite early before the correctly timed spark occurs (pre-ignition, refer to engine knocking).

Notable early antiknock agents, especially Tetraethyllead, added to gasoline included large amounts of toxic lead.[1][2] The chemical was responsible for global negative impacts on health, and the phase out of leaded gasoline from the 1970s onward was reported by the UN to be responsible for $2.4 trillion in annual benefits, 1.2 million fewer premature deaths, higher overall intelligence and 58 million fewer crimes," the United Nations Environmental Programme said.[3][4] Some other chemicals used as gasoline additives are thought to be less toxic.