flex-fuel

adjective

ˈfleks-ˌfyü(-ə)l 

: designed to run on either traditional gasoline or a gasoline/alcohol blend (such as gasohol)

flex-fuel vehicles

In the past few years, Brazil's bioethanol industry has sprouted new wings thanks to higher petrol prices and 'flex-fuel' cars, which can sense different mixtures of petrol and ethanol and adjust their workings accordingly.

—Emma Marris

Examples of flex-fuel in a Sentence

Recent Examples on the Web

Most rentals are flex-fuel and accept gasoline (gasolina) or ethanol (etanol). — María Cristina Lalonde, Travel + Leisure, 29 Dec. 2025

Flex fuel can only be used in vehicles designed for it — called flex-fuel vehicles or FFVS — but even these vehicles getroughly 15% to 27% fewer miles per gallon using flex fuel compared to unleaded 87. — Sean McDonnell, cleveland, 15 May 2023

Word History

First Known Use

1987, in the meaning defined above

Rhymes for flex-fuel

• cruel
• dual
• duel
• fuel
• gruel
• jewel
• newel
• accrual
• nonfuel
• refuel
• renewal
• biofuel