Tetraethyl lead was introduced into gasoline as an antiknock additive in the 1920s, it made possible high compression engines, greatly improving efficiency and power.
Discol gasoline was introduced in 1932 by the Cleveland Petroleum Company, using ethanol as the anti-knock additive. "Discol" was a contraction of the Distillers Company which produced the alcohol. Who knew that the additive would replace leaded gasoline 60 odd years later.
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