The Genuine VW / Audi Oil Change Kit 5W-40 - 178530 is a comprehensive kit designed for changing the oil in a car. It includes three main components: an oil filter, an oil drain plug, and a specific type of oil. The oil filter is responsible for removing impurities and debris from the oil, ensuring that the engine runs smoothly and efficiently. The oil drain plug is used to drain the old oil from the car's engine, making room for fresh, clean oil. The specific type of oil included in this kit is a 5W-40 oil, which is recommended for use in VW and Audi vehicles. This type of oil is designed to provide optimal lubrication and protection for the engine, improving its performance and longevity. Overall, the Genuine VW / Audi Oil Change Kit 5W-40 - 178530 is a convenient and reliable option for maintaining the health of your car's engine.