Crude oil
Template:Liquid Crude Oil is a liquid extracted by Pumpjacks from Oil fields and is converted to Petroleum Gas, Light Oil, and Heavy Oil by an Oil refinery. It can be transported either in pipes or in barrels.
Oil field
Each oil field has a yield displayed as x%. Each percent is equal to 75 pumpjack cycles. An oil field with 80% has between 6000 and 6074 cycles left, as yield does not display decimal places.
While cycles left is greater than 750 (10%), each pumpjack cycle reduces the number of cycles left by one.
So unless an oil field with less than 10% is created by map editor, yield will never drop below 750 cycles.
The amount of oil a pumpjack extracts per cycle is 1.0 multiplied by yield or [number of uses left] / 7500, but not greater than 10.0.