The oxygen wont hurt as much as the hydrogen and the propane, the propane will hurt it quite alot actualy, whats fun to do with it though is port inject it into a desil, just like shooting noss, makes it knock like hell too.
Oxgen works like nos dose because in either case you are oxadising the air and well what besides fuel causes combustion, AIR, and more importantly OXYGEN, but if i were you Id got for the noss tank itself, mainly because the the oxygen will cut a valve or even a piston right in half, just like hitting the oxygen lever on a cutting tourch.
But good luck and happy runnings.
Maverick.