Is a piano ever oiled to keep the action working freely?
No way! Liquid lubricants, WD40, oils, and silicone should never be allowed near the strings, action, tuning pins or other piano parts. These lubricants are fine for car engines and tractors, but not wooden piano parts. Piano technicians use a variety of lubricants (mostly in dry form) for a select few places in the piano, but liquid lubricants can turn a perfectly serviceable piano into a useless piece of furniture so don’t be tempted to use them for any reason!
