In The Witcher computer game Edit

Brown oil
Details
Ingredients
Base	top-quality
Effect	causes bleeding
Duration	24 hours

"Curse your enemy bearing the name of Coram Agh Tera, the Lionhead Spider, and dip your blade in oil. An enemy wounded with the dagger will bleed to death even from a slight wound."

Brown oil accelerates bleeding; creatures lacking a circulatory system are immune to its effects. It offers a "considerable chance" of causing bleeding in foes with every hit.

Source Edit

• Samum

In The Witcher 2: Assassins of Kings Edit

Brown oil
Oil. Increases Bleeding
Description
Category	Common
Type	Sword upgrade
Ingredients
Effect(s)	+30%
Duration	5 minutes
Source	starting equipment / craftable
Price to buy	50 – 126
Price to sell	6
Weight	0.2

Geralt begins the game with four of these as well as the formula.

Journal EntryEdit

Wounds caused by a blade covered with Brown Oil do not heal. The blade grease also augments hemorrhaging. Hit an opponent with a blade covered with Brown Oil, adopt a defensive stance, and stall for time. The adversary soon drops to the ground due to loss of blood.

This oil is ineffective against creatures resistant to bleeding.