O Rings Available here. You know your car needs oil to lubricate your engine, but do you know how the oil gets to the engine? O-rings are the strong and silent heroes that prevent oil from seeping out as the oil pump pumps the oil up and through your vehicle’s engine. These circular linings are used for very strong sealing but over time, especially if you fail to change your oil regularly, they may become hard and weak. If you notice oil leakage coming from your car, you may have a stiff O-ring that needs replacement. Fortunately, MicksGarage.com has the right O-rings to fit your car and keep oil directed at your engine and not the pavement.