Excavation and resource efficiency.

[TalyonUngol]

So, lets say I build some refineries... does the resource efficiency actually assist in this or is this only for natural resources?

 

[DicRoNero]

So, lets say I build some refineries... does the resource efficiency actually assist in this or is this only for natural resources?

Excavation affects Rubber gain, but does nothing to Fuel.

edit: I suspect this was done due to code implementation, i.e. Resources are province-level things, and Refinery just adds Rubber over there, which can also be gained directly from 'mining', and that definitely had to be affected by Excavation tech. So they likely thought 'screw it!' and just allowed Refinery Rubber to also benefit from this tech.

 

[TalyonUngol]

Excavation affects Rubber gain, but does nothing to Fuel.

edit: I suspect this was done due to code implementation, i.e. Resources are province-level things, and Refinery just adds Rubber over there, which can also be gained directly from 'mining', and that definitely had to be affected by Excavation tech. So they likely thought 'screw it!' and just allowed Refinery Rubber to also benefit from this tech.

Then not really worth it for me to get it as Germany atm.