Product — Fuel Oil
D6 Fuel Oil Storage — Heated Tanks Network-Wide
Heavy residual fuel oil storage across Rotterdam, Houston, Jurong, Fujairah, and Ningbo-Zhoushan terminals, with heating, blending, and vessel bunkering support.
We store this product — we do not trade it. All D6 Fuel Oil remains the property of the client.

Product Overview
About Fuel Oil D6
Virgin Fuel Oil D6, also known as Distillate Fuel Oil No. 6 or Bunker C, is a heavy residual fuel oil — the thickest fraction remaining after crude oil is refined and lighter products have been extracted. It is characterised by its high viscosity, dark colour, and relatively high sulphur content, which requires desulphurisation for use in emission-controlled environments.
D6 is used extensively in large industrial applications including power generation at heavy fuel oil (HFO) power plants, marine bunker fuel for older or long-haul vessels, industrial boilers, and large-scale heating applications. It is valued for its high calorific value per unit volume and its cost competitiveness relative to lighter distillate fuels.
Storage of D6 requires heated tanks to maintain product fluidity for pumping, as the high pour point can cause the product to solidify at ambient temperatures. Our Rotterdam terminal provides steam-traced and electrically heated storage tanks with precise temperature control, ensuring the product remains pumpable and homogeneous throughout the storage period.
Transport is typically by vessel (bulk tanker), large road tanker, or barge on inland waterways. Our Rotterdam Maasvlakte location provides direct deep-water berth access for VLCC and Suezmax class tankers, as well as barge access for distribution into the Rhine river system.
Fuel oil storage is available at every terminal in our network — Rotterdam, Houston, Jurong, Fujairah, and Ningbo-Zhoushan — making D6 and related heavy fuel oil grades one of our most broadly available products. Our Fujairah terminal additionally offers direct vessel bunkering, positioning it as a key supply point for VLSFO and HSFO bunker fuel in the Middle East.
Technical Specifications
| Parameter | Typical Value | Test Method |
|---|---|---|
| API Gravity | 20–25° | ASTM D287 |
| Kinematic Viscosity @ 50°C | 300–400 cSt | ASTM D445 |
| Flash Point (PMCC) | 60°C min | ASTM D93 |
| Sulphur Content | ≤ 3.5% m/m | ASTM D4294 |
| Pour Point | +15°C max | ASTM D97 |
| Density @ 15°C | 920–970 kg/m³ | ASTM D4052 |
| Gross Calorific Value | 39,500–40,500 kJ/kg | ASTM D240 |
| Water Content | ≤ 0.5% v/v | ASTM D95 |
| Ash Content | ≤ 0.10% m/m | ASTM D482 |
| Sediment (IP470) | ≤ 0.10% m/m | IP 470 |
Storage Conditions
- Heated tanks (40–65°C operating)
- Fixed roof tanks with floating blanket
- Steam-traced pipework
- Tank mixing provisions
- Continuous temperature monitoring
Transport Options
- Vessel charter (VLCC, Suezmax)
- Coastal barge
- Road tanker (heated)
- Rail tanker (where applicable)
Related Services
Who We Serve
Fuel Oil Storage for Bunkering, Power & Trading
Shipping & Bunkering Companies
Bulk fuel oil storage supporting vessel bunkering operations, particularly at our Fujairah bunkering hub.
Power Generation & Industrial Buyers
Large-volume heavy fuel oil storage for HFO power plants, industrial boilers, and large-scale heating applications.
Fuel Oil Traders
Spot and term storage positions for fuel oil trading, blending, and inventory management across our terminal network.
Our Process
From Receipt to Redelivery
Tank Allocation
Product is allocated to a heated tank sized and configured for the required viscosity and pour point.
Receipt & Heating
Fuel oil is received by vessel, barge or road tanker and brought to operating temperature to maintain pumpability.
Storage & Mixing
Tanks are steam-traced or electrically heated with mixing provisions to keep the product homogeneous.
Quality Monitoring
Viscosity, sulphur, and water content are monitored throughout the storage period against agreed specification.
Release & Delivery
Product is released by vessel charter, coastal barge, heated road tanker, or rail, with a release certificate.
Primary — steam-traced heated tanks
Gulf Coast fuel oil storage
Asia-Pacific fuel oil storage
VLSFO/HSFO bunkering hub
China coastal fuel oil storage
Why Choose Us
Why Store D6 Fuel Oil With Unlimited Logistics B.V.
D6 Fuel Oil FAQ
D6 Fuel Oil Storage — Common Questions
Request Information
Enquiring about: Virgin Fuel Oil D6
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