Hazardous waste is waste that poses substantial or potential threats to public health or the environment. In the United States, the treatment, storage, and disposal of hazardous waste is regulated under the Resource Conservation and Recovery Act (RCRA).
Porsche recommends that the oil in the Boxster be changed every 15,000 miles as a part of the normal maintenance procedure. The recommended oil is Mobil 1 comes in several different grades. If you wish to change your oil more often and want to avoid some of the expense associated doing so, you can change it yourself.
Remove and Replace the Oil Filter. The oil filter is on the left side back of the engine under the car. It takes an oil filter wrench (available at all car parts stores or places that carry auto accessories, oil, etc. The Porsche part number is 000.721.920.40.) that will measure 74 mm across the flat part.