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:
“The lean cats of the arches of the churches,
That’s the old world. In the new, all men are priests.”
—Wallace Stevens (1879–1955)
“Most souls, ‘tis true, but peep out once an age,
Dull sullen pris’ners in the body’s cage:
Dim lights of life, that burn a length of years,
Useless, unseen, as lamps in sepulchres;”
—Alexander Pope (1688–1744)