Thanks to pricey fuel and tax incentives, car and van mileage has fallen for four consecutive years and fuel efficiency has increased, notably because new cars have better engines.

由于高昂的燃油费和税收刺激，汽车和货车的行驶公里数连续四年下降，同时燃料的使用效率也在提高，最显著的原因是新车使用了更好的引擎。

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Diesel fuel has a higher energy density than gasoline, so a diesel engine gets better mileage.

柴油比汽油能量密度更高，所以柴油发动机行程更长一些。

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Mitsubishi Motors, Japan's sixth-largest carmaker, admitted that its employees had altered data in fuel-consumption tests for some of its models so that they would record better mileage.

日本第六大小轿车制造商三菱汽车承认，其雇员已在某些车型的燃油消耗测试中篡改数据，使之能虚报里程数。

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Terrific...but don't you think it makes sense to be able to drive one that gets better fuel mileage?

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He said he favors policies that mandate energy efficiency and conservation, including better fuel mileage for cars and insulation for buildings.

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That is because technological gains in fuel efficiency, instead of being used for better mileage -- something that American car buyers seem to actually care little about -- were used for increased size and speed.

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