Hey Mizer, we need to tone down questions relating to simply trying to get high. That's not what we're here for man. We're here to try to keep you safe. Also, this is research that I really believe you're capable of getting to on your own. Part of becoming a productive member of the community is learning how to conduct research yourself. Wouldn't it be nice to not have to wait for an answer from one of us and to just find it yourself?
The oral bioavailability of Oxycodone is quite high actually, in the 80th decile. Even if you were to inject your Oxycodone, which I greatly discourage, you would only be getting a ~15% benefit in bioavailability increase and you would be left with a shorter duration. There's not much you can do, although I would highly reccomend investigating rectal administration. As a rule of thumb, most drugs are better by the rectal route. I'm really not afraid to say that I use this route for most substances that I use, as I've been off the needle for a few years now.