av-gas

A small airplane is refueled with av-gas on the tarmac.

Definition

1. Noun:
   • Aviation gasoline: "Av-gas" is a high-octane fuel specifically formulated for use in piston-engine aircraft, distinct from jet fuel used in turbine engines.

Usage Examples

• Noun:
  • The pilot filled the plane's tanks with av-gas before takeoff. (Aviation gasoline for the aircraft's engine.)
  • Small airports often sell av-gas at a premium price. (Fuel sold for piston-engine planes.)

Advanced Usage

• "Av-gas vs. Jet fuel": Av-gas is leaded and has a higher octane rating than unleaded mogas (motor gasoline) to prevent engine knocking in high-compression aircraft engines.
  • The mechanic warned that using mogas instead of av-gas could damage the engine. (The specific fuel type matters for engine safety.)

Variants and Related Words

• Aviation gasoline (n): the full term for av-gas.

  • Aviation gasoline is dyed blue to distinguish it from other fuels. (A color-coded identifier.)

• Avgas (n): a common spelling variant of av-gas.

  • The airport's avgas pump was out of order. (Alternative spelling of av-gas.)

Synonyms

• Aviation fuel: a broader term that can include both av-gas and jet fuel.
• Piston engine fuel: fuel designed for reciprocating engines, not turbines.

Related Idioms

• There are no common idioms specifically using "av-gas," as it is a technical term.

Phrasal Verbs

• No phrasal verbs are associated with "av-gas," as it is a noun compound.