unleaded gasoline

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unleaded gasoline

A car is refueling with unleaded gasoline at a service station.

Definition
  1. Noun:
    • Gasoline without lead additives: Unleaded gasoline is a type of motor fuel that does not contain tetraethyl lead or other lead compounds, which were historically added to increase octane rating and reduce engine knocking.
Usage
  • Unleaded gasoline is the standard fuel for most modern vehicles with catalytic converters, as lead damages these emissions-control devices.
  • It is typically available in several octane grades (e.g., regular, mid-grade, premium).
Examples
  • Noun:
    • Most cars manufactured after 1975 require unleaded gasoline.
    • The price of unleaded gasoline has increased this week.
Advanced Usage
  • "to run on unleaded": A common shortened form meaning to use unleaded gasoline.
    • This lawnmower is designed to run on unleaded.
Variants and Related Words
  • Unleaded (adj): Often used alone to describe the fuel.
    • Please fill it up with unleaded.
  • Lead-free gasoline: A synonym for unleaded gasoline.
  • Premium unleaded: A higher-octane grade of unleaded gasoline.
Synonyms
  • Lead-free petrol (Common in British English)
  • Regular gasoline (When referring to the standard, non-premium octane grade of unleaded fuel)
Related Phrases
  • "Unleaded only": A warning or instruction found on fuel caps or in vehicle manuals indicating the required fuel type.
    • The fuel door clearly states "unleaded only".
unleaded gasoline

A car is refueling with unleaded gasoline at a service station.

Noun
  1. gasoline that has not been treated with a lead compound

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