Marine fuels

  • MGO (Marine gas oil) – roughly equivalent to No. 2 fuel oil, made from distillate only
  • MDO (Marine diesel oil) – A blend of heavy gasoil that may contain very small amounts of black refinery feed stocks, but has a low viscosity up to 12 cSt/400 C so it need not be heated for use in internal combustion engines
  • IFO (Intermediate fuel oil) A blend of gasoil and heavy fuel oil, with less gasoil than marine diesel oil
  • MFO (Marine fuel oil) – same as HFO (just another “naming”)
  • HFO (Heavy fuel oil) – Pure or nearly pure residual oil, roughly equivalent to No. 6 fuel oil

Standards and classification

  • IFO 380 – Intermediate fuel oil with a maximum viscosity of 380 Centistokes/500 C
  • IFO 180 – Intermediate fuel oil with a maximum viscosity of 180 Centistokes/500 C
  • LS 380 – Low-sulphur (<1.5%) intermediate fuel oil with a maximum viscosity of 380 Centistokes/500 C
  • LS 180 – Low-sulphur (<1.5%) intermediate fuel oil with a maximum viscosity of 180 Centistokes/500 C
  • MDO – Marine diesel oil.
  • MGO – Marine gasoil.