Residual Marine Fuel Oil is the general classification of heavy fuel oil and is considered as the most important byproduct after gas oils and gasoline is extracted. It’s mainly used in marine engines, industrial boilers, and power generation units, offering high thermal output and stable combustion. It helps in calculating carbon aromaticity index that indicates the ignition delay of fuel oil. It meets ISO 8217 standards.
| Specification | RMG 180 | RMG 280 | RMG 380 | Test Method ASTM |
| Viscosity @ 50°C | Max 180 cSt | Max 280 cSt | Max 380 cSt | D445 |
| Sulfur Content | Max 3.5% | Max 3.5% | Max 3.5% | D2622/D5453 |
| Pour Point | Max 30°C | Max 30°C | Max 30°C | D97 |
| Appearance | Dark brown to black | Dark brown to black | Dark brown to black | D-1500 |
| Density @ 15°C | Max 991 kg/m³ | Max 991 kg/m³ | Max 991 kg/m³ | D1298/D4052 |
| Flash Point | Min 60°C | Min 60°C | Min 60°C | D93 |
| Water Content | Max 0.5% | Max 0.5% | Max 0.5% | D6304 |
| Ash Content | Max 0.10% | Max 0.10% | Max 0.10% | D482 |