I make a opti factory with refinery

150+150 oil for : 450 rubber, and 450 plastic

300 oil added : production x2 (par défaut) = 900 plastic, 900 rubber

Blender version.

Mod dependance : Structural solution (and Universal destroyer for coral pillar x2)

Alt recipe :

Rubber : https://static.wikia.nocookie.net/satisfactory_gamepedia_en/images/3/30/Rubber_production_schematic.png/revision/latest?cb=20200510160504

Plastic : https://static.wikia.nocookie.net/satisfactory_gamepedia_en/images/6/64/Plastic_production_schematic.png/revision/latest?cb=20200510160445

I also added a small circuit to activate to produce conditioned gasoline, directly recoverable or sent to the garage, in the basement.

Refinery version, without blender : https://satisfactory-calculator.com/en/blueprints/index/details/idU/6630/user/Celti/id/1155/name/Rubber-Plastic+opti+factory+%28300+for+900%29

If you want create your own, you can use my sheet for any quantity you want, it will give you the machines and in what order : https://www.dropbox.com/s/2uns5lupypkyqja/Satisfactory%20-%20Planificateur%20de%20base%20%5BEN-FR%5D%20V2.1.1.23.ods?dl=0 sheet : opti recipes