Used oil is recyclable. Two and one half quarts of lubricating oil is gained by re-refining one gallon of used oil. You can participate in oil recycling by draining the used oil into a clean container with a tight fitting cap. Do not mix the recovered oil with any other liquid and make sure the oil is free from dirt, leaves and other debris. Many auto parts stores will accept your oil for recycling.
Automobiles use lead-acid batteries.
Lead-acid batteries contain lead and sulfuric acid. The lead can contaminate water and the acid can burn skin. These batteries have approximately 18 pounds of toxic metals and a gallon of corrosive acids. Damaged, leaking batteries improperly disposed of in the regular trash also pose a danger to refuse collectors who can come in direct contact with sulfuric acid. They are also a fire hazard.