31.   By contrast, the fuel efficiency of American cars has not budged.

32.   Congress approved sweeping new rules calling for a doubling of the fuel efficiency of cars.

33.   Congress, in thrall to industry, has been steadfast in its obdurate opposition to fuel efficiency and renewable energy programs.

34.   DaimlerChrysler says that the gains in fuel efficiency result in part from the downsizing of components in the hybrid vehicle.

35.   Consumers often take fuel efficiency into account when they are considering buying a new car or moving to a new home that may be further from work.

36.   Earlier, it defeated an effort by conservationists to require auto manufacturers to increase fuel efficiency of cars and trucks.

37.   Environmentalists decried the failure to impose tighter standards on automobile fuel efficiency.

38.   Early Wednesday evening, the Markey-Boehlert team suffered a stinging defeat in their attempt to improve fuel efficiency.

39.   Even with this added power it gets respectable fuel efficiency.

40.   Extra weight kills fuel efficiency.