Some articles on benzene:
Benzen - Uses - Component of Gasoline
... As a gasoline (petrol) additive, benzene increases the octane rating and reduces knocking ... As a consequence, gasoline often contained several percent benzene before the 1950s, when tetraethyl lead replaced it as the most widely used antiknock additive ... With the global phaseout of leaded gasoline, benzene has made a comeback as a gasoline additive in some nations ...
... As a gasoline (petrol) additive, benzene increases the octane rating and reduces knocking ... As a consequence, gasoline often contained several percent benzene before the 1950s, when tetraethyl lead replaced it as the most widely used antiknock additive ... With the global phaseout of leaded gasoline, benzene has made a comeback as a gasoline additive in some nations ...
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