What does "flex-fuel" mean?

Of a motor vehicle: having its internal combustion engine designed to run on more than one fuel, usually gasoline blended with either ethanol or methanol fuel.

Flex-fuel

adj

adj ·Rare ·Advanced level

Definitions

Adjective

1
Of a motor vehicle: having its internal combustion engine designed to run on more than one fuel, usually gasoline blended with either ethanol or methanol fuel. not-comparable

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.