unleaded gasoline
Definition
- 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".
Noun
-
gasoline that has not been treated with a lead compound
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