Hunter Original ceiling fans have an oil reserve that lubricates them
during use, The oil level needs to be checked periodically with a home
made pipe cleaner dip stick. Hunter says to use SAE 10 non-detergent
oil- which they sell in one ounce tubes for eight bucks a pop.

I've got a number of those fans in my house and several of them need
oil. I thought to use some from an unopened quart of name brand SAE 10
non-detergent oil that I bought for a couple of bucks a year or so back,
rather than go into debt to buy theirs.

I haven't been able to get a response from the Hunter Customer
No-Service folks for the last 10 days or so but it's getting hot now and
I want to start using the fans.

Whaddya think about topping them up with the cheaper stuff?