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| description = If you have crude oil in your veins and your heart pumps jet fuel, your city is ready for a Petroleum HQ. Sell crude oil on the global market via a Trade Depot to access petroleum improvements, including refineries, so you can produce fuel and plastic.
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Petroleum HQ unlocks when you extract 9,600 barrels of crude [[oil]] in a day.
==Petroleum HQ Upgrades==
{| class="wikitable sortable"
|-
! Level
! Name
! Requirement
! Description
|-
| 1 || Petroleum HQ || Extract 9,600 barrels of [[oil]] in a day || Unlocks one [[#Petroleum Divisions|Division]] of your choice
|-
| 2 || Petroleum, Co. || Earn §200,000 in [[drilling|petroleum]] daily profit || Unlocks one Division of your choice
|-
| 3 || Petroleum, Inc. || Earn §2,000,000 in petroleum daily profit || Unlocks one Division of your choice