The gas siblings pay a substantial fuel economy penalty, but the rush is worth it, in my opinion.

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It had been somewhere between 20 and 30 years since we had a substantial improvement in fuel economy.

WHITEHOUSE: Press Briefing

Enter the all-purpose tou, the butchers and venders who mastered that practical but scary implement, and the substantial savings in fuel that the quick stir-frying of tou-cut food provided.

NEWYORKER: A Fork of One��s Own

Last week the Senate passed a substantial but flawed energy bill, which imposed tougher fuel-efficiency standards on cars but failed to consider a carbon tax or a cap-and-trade system.

ECONOMIST: The Democrats

On the plus side, the foundation acknowledged that substantial progress had been made in improving energy efficiency in both new and existing homes and reducing fuel poverty among vulnerable groups.

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Air France-KLM incurred a substantial operating loss in 2011 for the fourth straight year, due, among other things, to rising fuel costs, a senior executive said.

WSJ: What's News

Still, observes Reid, there is a substantial short interest in the stock (15% of float in October), which tends to add fuel to a stock's gains when shorts have to cover their position by buying shares.

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