If it is only oxycodone and not any other active ingredients, intranasal - crush it up and snort it. take some benadryl to potentiate it. 50mg of that.
if it has APAP/tylenol in it, don't snort it, just eat it. oxy has a high oral BA, so it's not going to make a big difference whether eaten or snorted.
I find snorted oxy to be a more stimulating opioid, while oral oxy to be more sedating in comparison.