Raw linsseed oil will penetrate and impregnate wood, a procedure typically used in knife making is leaving handle in a jar filled with oil to soak overnight, 24 hours or a week, not really sure about the proper time, a more labour intensive method is coat after coat after coat until the wood is not accepting any more oil, result is good but lacks surface protection
Boiled linsseed oil can be used as a follow up to give wood some surface protection and slight satin sheen while keeping look and feel of the wood.
Downside of oil finish: it will most likely give wood a yellow tint, actual hue varies depending on wood and oil used