The OPS-1 On Board Refiner cleans and refines oil without affecting the engine's full flow filtration system. The OPS-1 removes solid contaminants, eliminating the particles that cause the majority of engine wear damage. The OPS-1 also removes liquid contaminants (mainly water, fuel and glycol) and returns 100% clean, refined oil to the engine, eliminating the need for oil drains and significantly reducing expenses for oil, filters, oil disposal and labor.