Witch grease or oil for rods

K8200 3D Printer K8200 - Assembly and user manual
1

Hello
I would like to know witch grease or oil i must put on rods ?
Is Wd40 is ok or i must put other thing ?

2

The best is to use silicon grease, but you can put WD40, it’s better than nothing

3

Thanks very much for your help
I will use silicon grease
Witch silicon grease you use ?