New fuel

I’ve had this idea for a very long time. The idea is to dig down in certain areas and strike OIL. Collect it with glass bottles or buckets. The bottles are used to light a mining headlamp which slowly burns out needing the wearer to continue refilling the headlamp. This can save placing a million torches while mining or spellunking. It can also be used as a Fast Fuel in a furnace using a bucket of oil. Headlamp would be made with a glass bottle of oil, a string for the wick, a helmet of choice and lit using a flint and steel. But not a fire charge as that’d explode the bottle and set the player on fire.