Oilers, or greasers, ensure that moving parts of machinery are properly greased. The job requires you to maintain equipment, apply proper lubrication, and ensure that any potential safety issues are brought to the attention of supervising staff. You also keep records of pressure and temperature gauges to ensure everything is running within design parameters. On ships, an oiler may also do work in other areas related to the engineering department or help with shipping tasks, depending on the ship’s command structure and needs.