Before this gets out of hand we are talking about wood lathes and centers.
Not metal lathes or bearings or ways or tailstocks.
Pure lunacy to put grease or oils in a revolving or dead center but there are plenty of lunatics here that may want to try it init?
Go ahead, try it and see what it does to your wood and workshop and you.
Some people can't be helped init?
And others just jump in when they don't got a clue what they are talking about.
Try reading the thread before gobbing off.