Watch Out Some Oiler Job Interview Questions? An oiler on a ship is a member of the engine department who is responsible for lubricating and maintaining the ship's machinery, including engines, pumps, and other mechanical systems. They work under the supervision of engineers and are essential for ensuring the smooth operation and preventing equipment failures. ■ If you aren't following us, you would probably never meet us again. Watch till the end and Learn Like, share and always comments under