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IFO Spec

Latest ISO 8217 Fuel Standard Fourth Edition 2010 Marine Residual Fuels.

PARAMETER UNIT LIMIT RMA(A) RMB RMD RME         RMK    
Viscosity at 50°C mm²/s Max 10.00 30.00 80.00 180.00 180.0 380.0 500.0 700.0 380.0 500.0 700.0
Density at 15°C kg/m³ Max 920.0 960.0 975.0 991.0 991.0       1010.0    
Micro Carbon Residue % m/m Max 2.5 10.00 14.00 15 18.00       20.00    
Aluminium + Silicon mg/kg Max 25 40   50 60            
Sodium mg/kg Max 50 100   50 100            
Ash % m/m Max 0.040 0.070     0.100       0.150    
Vanadium mg/kg Max 50 150     350       450    
CCAI Max 850 860     870            
Water % V/V Max 0.30 0.50                  
Pour point (upper) (b), Summer °C Max 6   30                
Pour point (upper) (b), Winter °C Max 0   30                
Flash point °C Min 60.0                    
Sulphur (c) % m/m Max Statutory requirementa
Total Sediment, age % m/m Max 0.10                    
Acid Number (e) mgKOH/g Max 2.5                    
Used lubricating oils (ULO): mg/kg The fuel shall be free from ULO, and shall be considered to contain ULO when either one of the following conditions is met:
Calcium and Zinc; or Calcium and mg/kg Calcium > 30 and zinc >15; or
Phosphorus mg/kg Calcium > 30 and phosphorus > 15.
Hydrogen sulphide (d)   Max 2.0                    
(a) This residual marine fuel grade is formerly DMC distillate under ISO 8217:2005.
(b) Purchasers shall ensure that this pour point is suitable for the equipment on board, especially in cold climates.
(c) The purchaser shall define the maximum sulphur content according to the relevant statutory requirements
(d) Effective only from 1 July 2012.
(e) Strong acids are not acceptable, even at levels not detectable by the standard test methods for SAN.