fuel detergency

例句：

1. 1. The engine requires a certain level of fuel cleanliness to operate efficiently.
   发动机需要一定的燃料清洁度才能高效运行。
2. 2.The fuel cleanliness of the engine is critical for its longevity.
   发动机的燃料清洁度对其使用寿命至关重要。
3. 3. To ensure optimal performance, it's important to maintain a high fuel cleanliness level in the engine.
   为了确保最佳性能，重要的是保持发动机中燃料清洁度的高水平。