Ten young women: five with 'oil', five out of 'oil': five accepted five dismissed. What is the oil!?

Is Jesus is saying that the oil is not our love or faith or patience or anything we can do or manufacture or achieve ourselves? What if instead, the ‘oil’ is a gift; gift to be received that makes us ready, not work to be done that hopefully makes us ready? Then this parable speaks of pure wonderful grace and fires our hearts in thankful faith and solid hope for what is to come because it is not based on me – but founded on Jesus.