James Sweet wrote:
I've had good luck with Marvel Mystery Oil, you can probably get by with
any light machine oil though, it's just a fan, nobody will die if the
bushings seize again.

I've used Singer sewing machine oil over the years on fans just like this.
The fans are nearly identical, the brand changes over the years. I think
the last brand name was Lakewood.

--
Music hath charms to soothe the savage breast.
That's why stereo has two channels.