Neste operates conventional oil refineries at Porvoo and Naantali in Finland and renewable diesel refineries in Porvoo, Singapore and Rotterdam, Netherlands. Neste holds also a 45% stake in a base oil plant in Bahrain. In Finland, four production lines are located at Porvoo refinery and the fifth at Naantali refinery. In 2015, two renewable diesel production lines in Porvoo produced 0.525 million metric tonnes of renewable diesel, which was approximately one fifth of the diesel consumption of Finland. Neste's production facility in Singapore is the largest renewable diesel refinery in the world, with an annual capacity of 1.1 million metric tonnes. A planned new production line is expected to increase its capacity by one million tonnes in 2022.