machine oil

例句：

1. 1. The machine oil needs to be changed regularly to keep the engine running smoothly.
   机器油需要定期更换，以保持发动机运行顺畅。
2. 2. The mechanics used special lubricating oil to prevent the engine from overheating.
   机械师们使用了特殊的润滑油来防止发动机过热。
3. 3.The new car has a high-quality machine oil system that ensures longevity and efficiency.
   这款新车拥有高质量的机油系统，确保了持久性和效率。