Crude oil
Overview
Crude oil is a fluid resource extracted from oil fields using pumpjacks. Oil fields have a displayed yield as a percentage; that percentage represents the remaining usable resource and governs how much crude oil a pumpjack produces each cycle. Oil fields can be used indefinitely, but the displayed yield and the actual remaining cycles decrease as pumpjacks operate.
Each percentage point of displayed yield corresponds to 300 pumpjack cycles. Without any speed modules, one pumpjack cycle takes one second to complete. While the number of cycles left is greater than 6000 (equivalent to 20% yield) and also greater than 20% of the initially available cycles, each pumpjack cycle reduces the cycles left by one. Because of this rule, an oil field that was not created below 20% yield in the map editor will never drop below 6000 cycles of remaining extraction.
The amount of crude oil a pumpjack extracts per cycle is the displayed yield multiplied by 10. For example, a field with 115% yield produces 11.5 units per pumpjack cycle. This extraction amount per cycle is capped at 1000 units, so very high yield values do not produce more than 1000 units per cycle.
- Each percent of yield = 300 pumpjack cycles remaining.
- Extraction per cycle = displayed yield × 10, with a maximum of 1000 units per cycle.
- An oil field will not decrease below 6000 cycles of extraction unless it was created below 20% yield in the map editor.
- Example: an 80% field has between 24,000 and 24,299 cycles remaining because the displayed percent rounds and does not show decimals.
These mechanics determine long-term production rates from crude oil fields and how pumpjack speed and yield interact to affect total output over time.
