Mineral Oil

Mineral Oil is a Tier 4 Oil-type Material for developing and upgrading weapons and armor at Chokufunsha.

Locations
Mineral Oil can commonly be found on Floors 31-40 of the Tower of Barbs.

May also be obtained at Gyaku-Funsha shops, as a reward from Lost Bags, and appear in the daily Hernia lineup.

Floors in  Bold  are connected to the main elevator / return you to the Waiting Room.

HIMOKAWA (38F) is one of the best places to farm Mineral Oil. About 5-7 can spawn.

Uses
NOTE: Tier is a level of power typically based on the number of times equipment has changed forms, not the number of stars it has.