Bunker C Fuel Oil
Bunker C is a high-viscosity residual fuel oil from petroleum, under 25° A.P.I., blended with biodiesel for marine and power generation use. Classified in HTS 2710.20.05.50 due to its heavy gravity and biodiesel inclusion in preparations where petroleum exceeds 70% by weight. It's distinct from lighter fuels or crude oils.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If without biodiesel
Pure petroleum residual fuels without biodiesel go to non-biodiesel subheadings.
If considered crude
Unrefined or minimally processed heavy oils may classify as crude petroleum.
If for other non-fuel preparations
If not used as fuel oil, certain preparations move to waste or other categories.
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Import Tips & Compliance
• Obtain flash point and sulfur content certifications; IMO-compliant low-sulfur variants may qualify for duty reductions
• Declare exact biodiesel percentage on entry docs to avoid reclassification; use ISO 8217 specs for bunker fuels
• Prepare for Coast Guard inspections on vessel bunkering; pitfall is missing MARPOL Annex VI compliance
Related Products under HTS 2710.20.05.50
No. 6 Fuel Oil
No. 6 fuel oil is a heavy residual fuel oil derived from petroleum refining, testing under 25 degrees A.P.I., used primarily for industrial boilers and large-scale heating systems. It falls under HTS 2710.20.05.50 as a distillate and residual fuel oil containing biodiesel blends with the specified gravity, not classified as crude or waste. This classification applies to fuel oils where petroleum oils exceed 70% by weight as the basic constituent.
Heavy Fuel Oil (HFO) Biodiesel Blend
Heavy Fuel Oil blended with biodiesel, testing under 25° A.P.I., serves as a low-cost energy source for ships and factories. HTS 2710.20.05.50 covers this as a residual fuel oil preparation with >70% petroleum oils and biodiesel, excluding waste or crude. Its density distinguishes it from lighter distillates.
Industrial Boiler Residual Fuel Oil
Residual fuel oil for industrial boilers, under 25° A.P.I. with biodiesel admixture, powers manufacturing heating. Under HTS 2710.20.05.50 for biodiesel-containing preparations >70% petroleum-based, not waste or crude. Meets chapter notes for fuel oils.
Power Plant Grade No. 6 Oil
No. 6 oil customized for power plants, heavy gravity under 25° A.P.I., with biodiesel for emissions compliance. HTS 2710.20.05.50 applies to such blended residual fuels where petroleum oils dominate. Used in electricity generation, not lighter fuels.