producing power, heat, etc., at a rate considered optimal with regard to the amount of fuel consumed.
- fu·el-ef·fi·cien·cy, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use fuel-efficient in a sentence
By paying attention to the things that make driving less fuel efficient, the Automatic Link has helped me save some money on fuel.
The premise of the device is to help a driver learn to be more fuel-efficient.
And members of this club include cars generally not thought of as highly fuel-efficient, like the Lincoln MKX.
With gas hovering near $5 per gallon in some areas, fuel-efficient vehicles are appealing to more and more customers.U.S. Car Fleet Sold in August Most Fuel-Efficient Ever | William O’Connor | September 16, 2013 | THE DAILY BEAST
A chunk of that improvement came directly from a new generation of engines that are at least 15 percent more fuel efficient.The Dreamliner Will Fly Again, But Is Boeing Still Blowing Smoke? | Clive Irving | March 26, 2013 | THE DAILY BEAST
I also call on the auto industry to use available technologies to make all new cars more fuel efficient right away.
But fuel-efficient maneuvers are rarely time-efficient ones.The Pirates of Ersatz | Murray Leinster