Forty years ago, the U.S. endured its first oil shock and, as a result, reduced its use of oil by improving gas mileage in cars and researching alternatives.
40年前，美国经受了第一次能源危机，这使得美国通过降低汽车油耗和研究替代能源减少了对石油的使用。
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Forty years ago, the U. s. endured its first oil shock and, as a result, reduced its use of oil by improving gas mileage in cars and researching alternatives.
40年前，美国经受了第一次能源危机，这使得美国通过降低汽车油耗和研究替代能源减少了对石油的使用。
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Diesel oils also have superior detergents to keep the engine's innards clean. That translates into lower oil consumption as well as better mileage.