I have been addicted and through cold-turkey withdrawal twice in my life. The first time on morphine, the second time on Oxycodone. The morphine was much, much worse, though that doesn't say much; the oxy wasn't exactly fun.

For what you're saying I doubt if you'll have a problem with tolerance/addiction/withdrawal. In both cases for me it did take a while. About a year for morphine, and on a heavy schedule. Also about a year for the oxycodone, and only when I veered off into a very heavy dosage.

I currently continue to take Oxycodone as my principal pain medification, 6-7 a day.