Oil does not show up until the Industrial Age when the use of the internal combustion engine becomes prevalent in vehicles, ships, and aviation. Oil essentially replaces food as a staple resource in the late-game, as it is needed for technology upgrades and modern units including tanks and aircraft. Oil is also used in the creation of some modern buildings and nuclear ICBMs.
Gathering Oil EditOil is gathered by building an Oil Well over a patch of oil and having a citizen operate the structure. Oil can also be gathered from the sea by sending a citizen out to build an Oil Platform on the oil patch. Upon completion of either structure the nation is granted a one-time bonus of 50 oil. Both Oil Wells and Oil Platforms then gather oil at a rate of 35 (per 30 seconds).Entering the Industrial Age also reveals a few more rare resources, some of which contribute to the oil production as well, if a Merchant from the Market is sent to the resource location. There are four rare resources providing a nation with oil.
The global gather rate of oil can be increased by building Refineries, with each Refinery adding 33% to the base gather rate of oil. A nation needs to develop Science 6 (Electronics) to be allowed to build Refineries. Building a refinery in every city may allow a nation with a relatively small amount of wells to still compete effectively.
The gather rate of rare resources in friendly (i.e. own and allied) territory can be increased by researching the Taxation line at the Temple (+50%, +100%, +200%, +300%) and by building the Porcelain Tower (+200%).
Aside from this, there are a few more things that affect oil production:
- The Eiffel Tower increases oil income by 100% of the base value (same effect as three Refineries) and increases the Commerce Limit for oil by 200.
- The Kremlin increases the Commerce Limit for Oil by 200, alongside that of Food, Timber, and Metal.
- The Russians receive a 20% bonus on oil production.
- Adopting the final consensus government Capitalism grants a nation a one-time bonus of 500 oil, as well as increasing the gather rate by +100 oil (per 30 seconds).
- Whenever possible, be sure to be the first to seize any available oil resource as you will not be the only nation competing for natural resources. This is important, especially when computer-controlled nations will follow this tactic frequently. Be quick to find and construct an oil well otherwise you may struggle in constructing military units.
- If you are unable to achieve the previous tactic, it is possible to build Refineries in every city to increase oil production.
- In the Scenario Editor, to place oil, you must place a patch of rocks then click on the rock patch again with the rock-placing tool.
- In the Scenario Editor, there is a gltich when placing an oil patch in the water. When this happens, the oil patch in the water will appear like the one on the land instead of the water.