Blended No. 4 Marine Bunker Fuel (High Sulfur)
A biodiesel-blended No. 4-type residual fuel oil for marine bunkering, with API gravity ≥25°, viscosity 45-125 SUS at 37.8°C, and sulfur >500 ppm. Fits HTS 2710.20.1025 as a preparation with ≥70% petroleum oils containing biodiesel, designed for ship auxiliary engines outside low-sulfur emission zones.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If pure petroleum without biodiesel
Absence of biodiesel shifts classification to general distillate fuel oils under 2710.19.
If for heavier residual grades <25° API
Lower API gravity classifies as heavier residual fuel oils in adjacent subheadings.
If imported as crude-derived unfinished base oil
Unrefined petroleum oils resembling crude fall under Chapter 27 heading 2709.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Include bunker delivery notes and sulfur analysis reports compliant with ISO 8217 marine fuel standards
• Declare exact biodiesel percentage to substantiate 70%+ petroleum oil basic constituent requirement
• Avoid ports with SECA restrictions to prevent off-spec issues upon arrival
Related Products under HTS 2710.20.10.25
No. 4 Fuel Oil (High Sulfur)
A medium-weight distillate fuel oil derived from petroleum refining, testing 25 degrees A.P.I. or more with Saybolt Universal viscosity between 45-125 seconds at 37.8°C, containing over 500 ppm sulfur. Classified under HTS 2710.20.1025 due to its fuel oil specifications and high sulfur content in biodiesel-blended preparations with 70%+ petroleum oils. Used primarily for industrial heating and marine applications.
Industrial Boiler No. 4 Fuel Oil (Sulfur >500 ppm)
Heavy distillate fuel oil blended with biodiesel for stationary industrial boilers, exhibiting 25°+ API gravity, 45-125 SUS viscosity, and exceeding 500 ppm sulfur. HTS 2710.20.1025 applies to this preparation where petroleum oils form ≥70% by weight as the basic component.
High-Sulfur Biodiesel Blend No. 4 Heating Oil
A No. 4-grade heating oil preparation containing biodiesel and >70% petroleum distillates, with sulfur >500 ppm, API ≥25°, and viscosity 45-125 seconds SUS. Classified in HTS 2710.20.1025 for its fuel oil characteristics and high sulfur in non-retail bulk form.
No. 4 Generator Fuel Oil (High Sulfur Content)
Distillate fuel oil for diesel generators, biodiesel-blended with ≥70% petroleum oils, >500 ppm sulfur, 25+° API, and 45-125 SUS viscosity at 37.8°C. Meets HTS 2710.20.1025 criteria for high-sulfur No. 4-type fuel oils containing biodiesel.