If you're a car owner-there are a number of us in this country-then you've likely been told, at one point or another, to change your oil every 3,000 miles. According to research by the California Integrated Waste Management Board, that's bogus. At 3000MileMyth, you can find out how often you really need to change your car's oil. Take a look, you might end up doing the environment a favor by reducing a small part of the millions of gallons of waste oil generated each year from oil changes.