Oil Filler/Breather Cap

Your oil filler cap allows you to replace oil that has leaked out or fill your engine after an oil change. In some cases, this may be a threaded or twist-on design. Other oil caps, especially on older vehicles, use a breather element that also helps with crankcase ventilation. If you lose or damage your oil cap, they are typically very easy to replace. A missing oil cap, or one that isn't sealing properly, can allow dirt and moisture into your engine, causing damage to critical engine parts as well as allowing evaporated oil to vent to the air. If you need an oil filler cap or breather cap, visit O'Reilly Auto Parts to find the right part for your car, truck, or SUV.