Will oxycodone 30mg show up in a drug test if you snort it?

If it's a drug test in the form of a blood test, then it will show up if you have taken the oxycodeine within approximately 48 hours of the test. If it's a hair strand test, it depends upon how long you have been snorting oxycodeine for. (E.g if you have only snorted it the once, one the day of the hair strand test, it is unlikely to show up, since your hair doesn't grow that quickly. If it's been a regular habit for a week or more, it will probably show up in your hair.)