They do predict that the sales mix will lean toward more fuel-efficient vehicles.

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Smart advertising and relentless data-crunching fuel this lean company.

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Additional tax credits for choosing hybrid, fuel cell, alternative fuel and advanced lean-burn technology vehicles have been offered since 2005.

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Options are the fuel that keeps cash payrolls lean at places like Microsoft and Qualcomm.

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Critters that can recycle parts of themselves for fuel are better able to cope with lean times than those that cannot.

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The company can also lean on a trade group, the U.S. Fuel Cell Council, whose members range from specialty companies like Fuel Cell Energy and Ballard Power Systems to giants like General Electric and United Technologies.

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