Danish oil is a tougher oil than tung as it also has linseed and varnish mixed into the tung.
Withstands weather very well.
If the wood is bear, use 3 coats of either oil you get.
Waxed base oils are also very good for weather protection such as Osmo.
Thank you for the information. The Tung oil ihas already been ordered so I will be using that. I plan to thin it out and apply multiple coats until it stops soaking in. The plow will see more loving next week than it has seen in, probably a century. And, it will be appreciated rather than just collecting dust in my barn.