In the last four years, Washington DC area motorists disposed of 11.2 million gallons of oil. The improper disposal of used oil, oil filters, and antifreeze by those who perform their own automobile maintenance is a ubiquitous environmental concern. Three to 4.5 million gallons of used oil, 4.7 to 5.9 million oil filters, and approximately one million gallons of antifreeze were "lost" in our environment.
Today we use close to a billion light-duty oil filters sold in the United States. The average used light-duty oil filter contained on average six to eight ounces of oil, but this amount may be higher since American vehicles are much larger now. One innovative approach would be to promote reusable oil filters that are compatible with engines that use the one-piece sealed spin-on filter