The oil pan is one of the most important elements to keeping your oil where it belongs. Engine oil pans hold most of the oil in an engine at a given time. The oil pan is mounted underneath your vehicle and is sealed by an oil pan gasket. Usually, this gasket is constructed of rubber and will conform to the pan when it is installed. The oil that is housed in the oil pan will leak out if the oil pan gasket is damaged or failing. The longer that the oil pan gasket is on the car, the more chance there will be that it will have to be replaced. Be sure to have your oil pan gasket replace with aftermarket replacement oil pan gasket as soon as it starts to leak.