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fuel-efficient

[fyoo-uh l-i-fish-uh nt]
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adjective
  1. producing power, heat, etc., at a rate considered optimal with regard to the amount of fuel consumed.
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Related formsfu·el-ef·fi·cien·cy, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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