I don't know a way to make the oil glossy, oils tend to be muted. The oil finish I'm using now has a low lustre attributed to the Venice turpentine as per salopian. It may sound like apostasy but you might try a topcoat of Tru oil cut with linseed. The linseed will retard the Tru oil's quick set time and it will give that gloss you're after. I've cut it with lacquer thinner 50/50 to kill the gloss. It remained shiny but went on beautifully. A failure for what I was after, maybe a success for you Yogi.