Question: is stb the same as bbl?
Answer: Units encountered include bbl, STB (stock tank barrel to specify a barrel at surface conditions), and m3 or Sm3 (standard metres cubed), most often in Europe outside the UK. 1 barrel of oil = 42 US gallons = 159 litres = 0.159 m3. ... In commercial settings, it is common to see the tonne used instead of the barrel.