Oxygen should not be used as a ‘tool’ to get you up the mountain if you are not capable.
Make sure your team have oxygen with the group at all times on your way up to Everest Base Camp. Oxygen should only be used in an emergency situation.  If you need to go on Oxygen, then you need to get down lower on the trail immediately.  Oxygen should not be used as a ‘tool’ to get you up the mountain if you are not capable.  Do not put yourself, your team and guides at risk.