I agree with the others that IVing them is a bad idea. Oxycodone has a very high oral bioavailability (BA) of about 87%, so IVing it isn't even worth it that much when the pills have not been contaminated by whatever chemicals were in the detergent, the water itself, and on the clothes. Take the 13% loss in BA this time around, and with the trade-off you will even get a longer duration of the high.
I could see if someone was trying to justify this with opiates like oxymorphone or hydromorphone which have a significantly higher BA when IV'd compared to oral of nasal consumption, but even then I would just suggest the next highest BA route which would be nasal I believe.
The bottom line is that the risks outweigh the rewards. You can't get high that soon again if you end up in the hospital or worse...
Edit: By the way, roxicet refers to they oxycodone/acetaminophen drug preparation, so you have roxicodone (30mg oxycodone HCL instant release) although there are also 30mg OxyContin but I doubt that's what you have since those are very rare, and have been replaced by the OP "abuse proof" formula. I'm not trying to be annoying, but just clearing things up for any future questions you may have about this drug.