Fushun Mining Group reports producing 300,000 tons per year of shale oil from 6.6 million tons of shale, a yield of 4.5% by weight.[26] VKG Oil claims to produce 250,000 tons of oil per year from 2 million tons of shale, a yield of 13%.[27] Petrobras produces in their Petrosix plant 550 tons of oil per day from 6,200 tons of shale, a yield of 9%.[28]