I may be dump but I have a hard time determining the speed of oil extraction in my game. What are the actual formula right now ? I need that to set up my circuit network :/

As of version 1.1.2, the mining_time is 0.275, it always gives 5, and the vanilla pumpjack mining_speed is 2.

Thanks. So it mines 218 (and something) time per minute but twice that because of the mining speed and since it gives 5 everytimes, a pumpkac with no upgrade is producing 2181.81...81 that's it ?

That sounds accurate to me