Abstract: A device and method for reconditioning oil or vaporizing volatile fluids from oil of internal combustion engines in order to extend the oil service life is provided. Such a device can include a housing which defines a substantially enclosed open chamber which can receive heated engine oil. An engine oil inlet, a vapor outlet, and a reconditioned oil outlet may be coupled to the housing. In addition, the disclosed oil reconditioning device may be free of direct heating or supplemental heating sources other than the intrinsic heat of the heated engine oil as it enters the open chamber. The reconditioning devices can be configured to introduce engine oil into the open chamber prior to contact with any interior surfaces. Separation of volatile fluids can be affected using either spraying or thin film. The reconditioned oil has a significant reduction in water and fuel content thus allowing for increased service intervals and increased useful oil life.