Polski Koncern Naftowy ORLEN S.A. operates as a refiner of crude oil in central Europe. The company processes crude oil into unleaded petrol, diesel, heating oil, and aviation fuel, as well as plastics and other petroleum related products. Its products include fuels and motorcar and motorcycle oils, as well as cosmetics and engine coolants. The company also manufactures propane-butane liquefied gases, low sulphur diesel fuels, aviation fuel, and marine oils; compressor, machinery, cutting, hydraulic, and gear oils; bitumens; and petrochemicals, primarily polyethylene and polypropylene. In addition, it offers propane-butane liquefied gas and heating oil for homes. Polski Koncern Naftowy operates 7 refineries, of which 3 are located in Poland, 3 in the Czech Republic, and 1 in Lithuania; and a network of approximately 1,900 petrol stations in Poland, 500 outlets in Germany, 330 stations in the Czech Republic, and 30 in Lithuania. It offers its products through a wholesale and retail network primarily in Poland and Germany. The company was formerly known as Mazowieckie Zaklady Rafineryjne i petrochemiczne petrochemical Plock S.A. and changed its name to Poiski Koncern Naftoway Spolka Ackyina in 1999. Later, the company changed its name to Polski Koncern Naftowy ORLEN Spolka Akcyjna in 2000. Polski Koncern Naftowy is headquartered in Plock, Poland.