Mod that I originally made for a Murder Drones roleplay server, but I thought other people might need it as well.

How it works:

If you hit a player with damage more than 5 (e.g. with Iron Sword), you get a bottle of oil. You also get one if you kill a player. It's consumable even when your hunger bar is full.

Damage needed to get oil, nutrition and saturation are configurable in the mod config. There is no UI for config so you might wanna use a separate mod for it if you need it.