According to the US authorities used oil is not a hazardous waste. Once your environment is done for you move somewhere else. Nice legacy for the next generation.
Government regulation is just a hindrance to companies. Less government heh!
Hazardous waste is defined as liquid, solid, contained gas, or sludge wastes that contain properties that are dangerous or potentially harmful to human health or the environment.
Anyone for another glass of oil. Cheers!