Bonjour,
As I use 480 grade oil for my machines, I use a syringe with a 1-2 mm brass pipe, so I would never use this lubricator. I like buying to JMC glass lubricators for my large machines but they are quite expensive.
On Jin's steam plant, I also changed the oil lubricator because it was not in the flow of the steam and not efficient:
In most of my hulls, I can not use my fingers to unscrew the plugs that are under the lubricators...