Is it illegal to filter and recycle waste oil? 1. It is illegal to buy and sell gutter oil without permission. According to the relevant regulations of the state, engaging in the disposal and utilization of waste mineral oil must have the national qualification for hazardous waste disposal. If the waste engine oil is provided to a non-hazardous waste management qualification unit for treatment and utilization, it will be ordered to stop the illegal act, make rectification within a time limit, and impose a fine according to the seriousness of the case. Second, waste oil, that is, waste mineral oil, refers to all kinds of waste engine oil, waste gasoline, waste diesel oil, waste gear oil and waste hydraulic oil produced by industrial and mining enterprises in the process of motor vehicle maintenance, construction and production and operation. It contains many toxic substances and is recognized as a carcinogenic and mutagenic compound. If waste mineral oil is poured into the soil, plants will die. If it enters the drinking water source, 1 ton waste oil can pollute 1 10,000 tons of drinking water. @20 19