Some people like me like to play with low resource settings. Normal resources are usually generated, but with oil is a serious problem. I can not generate oil in such a way that the number of deposits was 1-6 and no more.
Here are some examples.
Low frequency, high size.
![Image](http://dl3.joxi.net/drive/2018/11/21/0003/0260/217348/48/bcdb0c480d.png)
Low frequency, normal size.
![Image](http://dl3.joxi.net/drive/2018/11/21/0003/0260/217348/48/42c9ca1e15.png)
Low frequency, low size.
![Image](http://dl3.joxi.net/drive/2018/11/21/0003/0260/217348/48/a4d6a5392e.png)
Low frequency, very low size.
![Image](http://dl3.joxi.net/drive/2018/11/21/0003/0260/217348/48/ca19b4aca1.png)
As you can see there is no difference between these settings.
Sometimes the generation breaks down so that the oil is very difficult to find.
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PS
Does oil depend on biome? Logically, there should be more oil in the deserts.