Visible emissions from lubrication oil reservoir vents on stationary internal combustion engines, compressors and turbines can be virtually eliminated through the use of properly engineered fiber beds. The fiber bed is more successful than other approaches at eliminating visible emissions because of the inherent low pressure drop, minimal or non-existent maintenance requirements, and proven collection efficiency. In fact, with fiber bed technology, visible emissions can be reduced to virtually zero percent opacity. This paper reviews the applicable emission standards, explores the nature of the lubrication oil vent (LOV) oil mist, describes some of the equipment that has previously been used to control LOV emissions, and details the application of fiber beds for this purpose.