Free will is only an oxymoron if you believe in fate. That is, if you believe everything in life is preordained; choice is just an illusion; someone or something wills you to do the things you do, it is not your choice. Free will would then be an oxymoron just like military intelligence, Microsoft Works, and peacekeeper missile.
If that\'s not what you believe, then free will is not an oxymoron. Perhaps, as someone mentioned, free will only exists on the small scale, but the bigger picture is controlled by fate. This would mean that the choices we make do not matter in the long run, as we will all end up in the same place.
Then there is the possibility that our will is truly free, and our future is not preordained. Every choice we make ripples out and effects our lives just as portrayed in the film The Butterfly Effect (great film by the way). Every time Ashton Kutcher went back in time and changed something, his present was greatly effected. Then again, maybe this is just the small scale and the rest of the world progressed exactly the same. No, not if the Terminator movies have anything to say about it. Killing important people should greatly effect the future. Though, if I remember correctly, they weren\'t able to change the future in the Terminator movies. It seemed to have been fated.
p.s. Luck is a term used to describe things that happen despite the fact that they have a low probability of happening. For example, you\'re lucky if you leave a casino with more money than you went in with.