What Are the Job Duties of an Oiler?
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.
https://www.ziprecruiter.com/career/...vising%20staff.
"Properly greased". As in they can slip and fall down a lot.