Systems and methods for testing an engine lubricant are provided. The system includes a heated block having at least one cavity therein, at least one test cylinder receiving the engine lubricant therein, and at least one heated test piston selectively disposable into the engine lubricant of the test cylinder whereby deposits are formable on the test piston. The test cylinder is positionable in the cavity of the heated block and heatable thereby. Taxi oils and/or gases may be added to facilitate testing.