No. 6 Fuel Oil
No. 6 fuel oil is a heavy residual fuel oil derived from petroleum refining, characterized by its high viscosity and API gravity under 25 degrees, making it suitable for large-scale industrial heating and power generation. It falls under HTS 2710.19.06 because it is a distillate and residual fuel oil obtained from bituminous minerals, testing under 25 degrees A.P.I., and contains over 70% petroleum oils as the basic constituent.
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More Specific Codes
This product may fall under a more specific subheading:
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If testing 25 degrees A.P.I. or greater
Fuel oils with higher API gravity shift to subheading 2710.19.11, as classification is strictly based on the API gravity test threshold.
If containing biodiesel
Preparations with biodiesel (mono-alkyl esters of fatty acids) are excluded from 2710.19.06 and classified under 2710.19.20 per chapter notes.
If imported in crude form prior to refining
Unrefined petroleum oils remain under heading 2709 as crude, not processed into distillate/residual fuels under 2710.
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Import Tips & Compliance
• Verify API gravity certification via lab testing (ASTM D287) to confirm under 25 degrees for proper classification under 2710.19.06
• Obtain Certificates of Analysis (COA) from suppliers detailing sulfur content to comply with EPA fuel standards and avoid misclassification
• Ensure proper storage and spill prevention documentation, as heavy fuel oils are subject to MARPOL Annex VI regulations for international shipments
Related Products under HTS 2710.19.06
Bunker C Fuel Oil
Bunker C, also known as Bunker Fuel Oil, is a high-viscosity residual oil used primarily for marine bunkering and industrial furnaces, with API gravity below 25 degrees due to its heavy hydrocarbon content. Classified under HTS 2710.19.06 as a residual fuel oil from petroleum, not crude, exceeding 70% petroleum oils.
Heavy Fuel Oil (HFO) 380 cSt
HFO 380 cSt is a residual fuel oil with viscosity of 380 centistokes at 50°C, used in power plants and large boilers, featuring API gravity under 25 degrees from its bituminous mineral origins. It qualifies for HTS 2710.19.06 as a blended residual fuel oil with predominant petroleum content.
No. 6 Residual Fuel Oil
No. 6 residual fuel oil is the heaviest fraction from crude distillation, used in cement kilns and steam generators, with low API gravity under 25 degrees indicating high density. HTS 2710.19.06 covers this as a non-crude petroleum residual fuel exceeding 70% oil content.
Industrial Boiler Fuel Oil
Blended industrial boiler fuel oil combines residual and distillate stocks to achieve API under 25 degrees, optimized for stationary combustion in manufacturing. It is classified in HTS 2710.19.06 for its petroleum-dominant composition as a residual-type fuel oil.
Marine Residual Fuel Oil RMK 500
RMK 500 is a marine-grade residual fuel oil with 500 cSt viscosity, API gravity under 25 degrees, designed for auxiliary engines on cargo ships. HTS 2710.19.06 applies to this non-crude, petroleum-based heavy fuel.
Power Plant Heavy Fuel Oil
Heavy fuel oil for power plants is a residual product with API <25°, high energy density for electricity generation turbines and boilers. Under HTS 2710.19.06 as preparations >70% petroleum oils, distillate/residual type.