What is the Difference Between Leaded and Unleaded Gasoline?

[McAndres]

The differences between leaded and unleaded gasoline are: 1. Different additives: Leaded gasoline adds tetraethyl lead as an anti-knock additive during the refining process; unleaded gasoline does not add tetraethyl lead during the refining process. 2. Different exhaust emissions: Leaded gasoline causes lead to be emitted into the atmosphere with the vehicle exhaust; unleaded gasoline significantly reduces hydrocarbons, carbon monoxide, and nitrogen oxides in the exhaust. Gasoline is a volatile and flammable hydrocarbon mixture liquid distilled or cracked from petroleum. At room temperature, it is a colorless to pale yellow, easily flowing liquid that is difficult to dissolve in water and is flammable. Mixing different grades of oil together can easily lead to incomplete combustion, producing carbon deposits and shortening the engine's lifespan.