cetane number improver

例句：

1. 1.The engine oil was tested to see if it improved the cetane number.
   发动机油被测试，以查看它是否提高了辛烷值。
2. 2. The new additive is designed to enhance the cetane number of gasoline.
   这种新的添加剂旨在提高汽油的辛烷值。
3. 3.The manufacturer claims that their product can significantly improve the cetane number of diesel fuel.
   制造商声称他们的产品可以显著提高柴油燃料的辛烷值。