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Petroleum is produced by operating a Deep Well. When a Deep Well is being cranked it produces 6 petroleum per minute.
- 1000 needed for Alternative Fuels research.
- 50000 needed for Chemistry Recipe Gear Oil research.
- 40 needed to fire a Petroleum-based Clinker Vat.
- Used as fuel in a Vitiation Kiln.
- Used as fuel in an Alchemist's Bench.
- Used to treat boards in a Wood Treatment Tank.