a nozzle particularly adapted for use in connection with mist oil lubricating units removes the mist oil from the carrier gas , collects the removed oil , and reintroduces it into the interior of the carrier gas flow such that it may be carried in the form of a series of uniformly sized drops to a target to be lubricated . the nozzle may include a helical flow path for the mist , during the traverse of which the mist oil is extracted from the unit , and a needle - like assembly which collects extracted oil and channels it into the interior of the gas flow as it exits the nozzle .