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ISO 8217:2005(F) fuel quality standard for distillate marine fuels. Parameter Unit Limit DMX DMA DMB DMC Density at 15 °C kg/m3 Max - 890.0 900.0 920.0 Viscosity at 40 ° C mm2/s Max 5.5 6.0 11.0 14.0 Viscosity at 40 ° C mm2/s Min 1.4 1.5 - - Micro Carbon Residueat 10% Residue % m/m Max 0.30 0.30 - - Micro Carbon Residue % m/m Max - - 0.30 2.50 Water % V/V Max - - 0.3 0.3 Sulfur 1 % (m/m) Max 1.0 1.5 2.0 2.0 Total S

ISO 8217:2005(F) fuel quality standard for RESIDUAL marine fuels. Parameter Unit Limit RMA30 RMB30 RMD80 RME180 RMF180 RMG380 RMH380 RMK380 RMH700 RMK700 Density at 15 °C kg/m3 Max 960.0 975.0 980.0 991.0 991.0 1010.0 991.0 1010.0 Viscosity at 50°C mm2/s Max 30.0 80.0 180.0 380.0 700 Water % V/V Max 0.5 0.5 0.5 0.5 0.5 Micro Carbon Residue % m/m Max 10 14 15 20 18 22 22 Sulfur 1 % m/m Max 3.5 4.00 4.50 4.50 4.50 Ash

Bunker Fuel Grades - How do the four main fuel grades differ from each other? The International Standard Organization (ISO) in cooperation with marine and petroleum industry prepared specifications to meet the requirements for marine fuels supplied world wide for use onboard ships. There are 19 categories of residual fuels available internationally. Out of these 19, four categories or grades are most frequently supplied and used by ships. Industrial names for the four grades are IFO180, IFO380