If choosing between those you list, I'd go with Tung oil.
Can you post a picture or two? Maybe a close-up and overall. If originally a penetrating type finish, renewing with oil might make some sense. If it was more a film finish, oil will make it look shinier but won't penetrate the wood itself to any great degree. Wax might be another possibility.
Contrary to marketing hyperbole wood does not require "feeding" as it ages. It's a dead tree.
Steer clear of stuff like Pledge and the like. Most contain silicone wax, which can look good at first, but is short-lived at best.
