Lean burn refers to the use of lean mixtures in an internal combustion engine. The air-fuel ratios can be as high as 65:1, so the mixture has considerably less fuel in comparison to the stoichiometric combustion ratio (14.64:1 for petrol for example).
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Famous quotes containing the words lean and/or burn:
“A mother is not a person to lean on but a person to make leaning unnecessary.”
—Dorothy Canfield Fisher (20th century)
“As long as our civilization is essentially one of property, of fences, of exclusiveness, it will be mocked by delusions. Our riches will leave us sick; there will be bitterness in our laughter; and our wine will burn our mouth. Only that good profits, which we can taste with all doors open, and which serves all men.”
—Ralph Waldo Emerson (1803–1882)