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lean-burn

British  

adjective

  1. (esp of an internal-combustion engine) designed to use a lean mixture of fuel and air in order to reduce petrol consumption and exhaust emissions

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Example Sentences

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The credit included the advanced lean-burn technology motor vehicle credit, which was available to buyers of qualifying vehicles that were certified by manufacturers as meeting certain emissions standards.

From Washington Times • Oct. 6, 2015

The upgrade included adding a lean-burn feedback system, renowned for its efficiency in maximizing horsepower at the same time it keeps fuel flow to a minimum.

From Time Magazine Archive

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.