leaded gasoline

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Definition

Noun: * Gasoline treated with a lead compound: A type of motor fuel to which lead additives, such as tetraethyl lead, have been added. The primary purpose of these additives was to increase the fuel's octane rating and prevent engine knocking in older internal combustion engines.

Usage
  • Leaded gasoline was the standard automotive fuel for much of the 20th century.
  • Due to the severe health and environmental hazards of lead emissions, the production and sale of leaded gasoline for on-road vehicles has been banned in most countries.
  • The mechanic explained that the classic car's engine was designed to run on leaded gasoline or a suitable modern substitute.
Advanced Usage
  • Historical/Technical Context: The term is now primarily used in historical, environmental, or technical discussions about automotive history, pollution, and public health.
    • The phase-out of leaded gasoline is considered one of the great public health successes of the 20th century.
  • Contrast with "unleaded gasoline": It is almost always used in direct contrast to its modern, standard counterpart.
    • You must use unleaded fuel in this car; it is not compatible with leaded gasoline.
Variants and Related Words
  • Leaded petrol (noun): The British English equivalent term.
  • Ethyl gasoline (noun): A historical brand name that became a common term for leaded gasoline.
  • Tetraethyl lead (noun): The specific lead compound used as the anti-knock additive in leaded gasoline.
Synonyms
  • Leaded fuel (noun): A more general term that can include other fuels like leaded aviation gasoline (avgas).
Antonyms
  • Unleaded gasoline (noun): Gasoline that contains no lead additives.
  • Unleaded petrol (noun): The British English equivalent.
Noun
  1. gasoline treated with a lead compound to reduce motor knocks
    • combustion of leaded gasoline released lead into the air where it could cause lead poisoning

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