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fuel efficiency

American  
[fyoo-uhl-i-fish-uhn-see] / ˈfyu əl ɪˌfɪʃ ən si /

noun

  1. the quality or degree of being fuel-efficient or of minimizing the amount of fuel needed to function.

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Meanwhile, improved fuel efficiency means that people aren’t pumping as much gasoline as before.

From The Wall Street Journal • Mar. 31, 2026

Transportation Secretary Sean Duffy is the father of nine, and in December he offered an odd defense of the Trump administration lowering fuel efficiency standards.

From Salon • Feb. 16, 2026

Demand for gasoline has decreased by approximately 2% annually since 2021, influenced by improved vehicle fuel efficiency.

From Barron's • Dec. 16, 2025

Chief Executive Mark George said that the company improved fuel efficiency, met other productivity initiatives and executed a noteworthy land sale that will deliver rail volumes for years ahead.

From The Wall Street Journal • Oct. 23, 2025

The loss through the water jacket of the average automobile power plant is over 50 per cent. of the total fuel efficiency.

From Aviation Engines Design?Construction?Operation and Repair by Pag?, Victor Wilfred

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.