4 sentences

1. 这种机器需要专用的润滑油。

   zhè zhǒng jī​qì xū​yào zhuān​yòng de rùn​huá​yóu.

   This machine requires a specific type of lubricating oil.

   Source: Dong Chinese Dictionary

2. 机器运行久了需要加点润滑油。

   jī​qì yùn​xíng jiǔ le xū​yào jiā diǎn rùn​huá​yóu.

   The machine needs some lubricating oil after running for a long time.

   Source: Dong Chinese Dictionary

3. 这条导轨需要定期涂抹润滑油。

   zhè tiáo dǎo​guǐ xū​yào dìng​qī tú​mǒ rùn​huá​yóu.

   This guide rail needs to be lubricated regularly.

   Source: Dong Chinese Dictionary

4. 这种牌号的润滑油在市场上很受欢迎。

   zhè zhǒng pái​hào de rùn​huá​yóu zài shì​chǎng shàng hěn shòu huān​yíng.

   This brand of lubricating oil is very popular in the market.

   Source: Dong Chinese Dictionary