No. 6 Fuel Oil
No. 6 fuel oil is a heavy residual fuel oil derived from petroleum refining, with an API gravity under 25 degrees, used primarily for industrial boilers and large-scale heating systems. It falls under HTS 2710.20.05 due to its classification as a distillate and residual fuel oil testing under 25 degrees A.P.I., containing by weight 70% or more petroleum oils as the basic constituent.
Import Duty Rates by Country of Origin
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 not containing biodiesel
Products without biodiesel content are classified under the general distillate/residual fuel oils subheading.
If testing 25 degrees A.P.I. or higher
Fuel oils with API gravity of 25° or above fall into the higher gravity subheading.
Not sure which classification is right?
Our AI classifier can analyze your specific product and recommend the correct HTS code with confidence.
Import Tips & Compliance
• Verify API gravity certification through independent lab testing to confirm compliance with subheading requirements under 25 degrees
• Ensure bills of lading specify exact petroleum content (>70%) and biodiesel absence to avoid reclassification
• Comply with EPA fuel quality standards and obtain necessary import permits for environmental compliance
Related Products under HTS 2710.20.05
Bunker C Fuel Oil
Bunker C is a high-viscosity residual fuel oil used in marine bunkering and power generation, characterized by API gravity below 25 degrees. Classified under HTS 2710.20.05 as a blended residual fuel oil meeting the criteria for distillate/residual fuels with predominant petroleum oil content.
Heavy Fuel Oil (HFO) Blend with Biodiesel
A biodiesel-blended heavy fuel oil with API under 25 degrees, designed for industrial furnaces and marine applications where renewable content is mandated. HTS 2710.20.05 applies as it contains biodiesel and qualifies as residual fuel oil with over 70% petroleum base.
Industrial Boiler Residual Fuel Oil
Residual fuel oil formulated for large industrial boilers, testing under 25° A.P.I., often blended with biodiesel for emissions compliance. It meets HTS 2710.20.05 as a petroleum-based distillate/residual fuel with biodiesel inclusion.
Marine Residual Fuel Oil MGO Blend
A biodiesel-blended marine gas oil residual mix with API gravity under 25 degrees, used in auxiliary engines. HTS 2710.20.05 covers this as distillate/residual fuel containing biodiesel from petroleum oils.
Blended Biodiesel Heavy Fuel Oil
Heavy fuel oil blended with mono-alkyl fatty acid esters (biodiesel) for reduced emissions, API under 25°. Fits HTS 2710.20.05 as biodiesel-containing residual fuel from bituminous minerals.
Power Plant Grade Fuel Oil
Low-API heavy fuel oil for electricity generation in power plants, incorporating biodiesel and testing below 25° A.P.I. per ASTM standards. Classified in HTS 2710.20.05 for biodiesel-containing residual fuels.