I concur with others, I would never try vaping RSO. Seems dangerous to me.
edit: some links,
http://www.rollitup.org/t/rso-vs-qwiso.745328/
http://www.reddit.com/r/CannabisExtracts/comments/2jep69/friend_made_oil_with_ever_clear_and_a_slow_cooker/
It may be safe to dab/vape if it has actually...