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 2710.19.11.25 due to its specific gravity, viscosity, and sulfur content meeting the criteria for No. 4-type fuel oils used in industrial heating.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If sulfur ≤500 ppm
Lower sulfur variants fall under the subheading for No. 4 fuel oils with 500 ppm or less sulfur.
If viscosity <45 SUS
Fuels with Saybolt viscosity below 45 seconds classify as lighter No. 2-type distillate oils.
If lubricating base preparations
If marketed as base for lubricants rather than fuel, it shifts to other petroleum preparations.
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
• Verify sulfur content via ISO 8754 test to confirm >500 ppm and avoid misclassification to lower sulfur subheadings
• Provide certificate of analysis showing API gravity and Saybolt viscosity to Customs for proper entry
• Ensure compliance with EPA fuel sulfur regulations for end-use to prevent penalties on import
Related Products under HTS 2710.19.11.25
Blended No. 4 Heating Oil (High Sulfur)
A blended distillate fuel oil for commercial heating systems, consisting of >70% petroleum oils with API ≥25°, viscosity 45-125 SUS at 37.8°C, and sulfur >500 ppm. Fits HTS 2710.19.11.25 as a residual/distillate blend designed for medium boilers and industrial furnaces.
Industrial No. 4-Type Fuel Oil (>500 ppm S)
Petroleum distillate fuel for industrial burners and generators, with Saybolt viscosity 65 SUS average, API 28°, exceeding 500 ppm sulfur content. HTS 2710.19.11.25 applies precisely to this No. 4 specification for non-road heavy equipment and factory heating.
High-Sulfur Bunker Grade No. 4 Fuel
A No. 4 specification bunker fuel for marine auxiliary engines and port generators, featuring >500 ppm sulfur, 25-30 API, and 90 SUS viscosity at 100°F. Meets HTS 2710.19.11.25 for distillate/residual fuels used in stationary marine applications.
No. 4 Diesel Blend Fuel Oil (High Sulfur)
Blended fuel oil combining diesel distillates and residuals to achieve No. 4 specs: API >25°, 45-125 SUS viscosity, sulfur >500 ppm, for off-highway diesel engines. HTS 2710.19.11.25 covers this as distillate fuel oil for heavy machinery.
Commercial Boiler No. 4 Fuel Oil (>500 ppm S)
Distillate fuel oil formulated for multi-burner commercial boilers, with precise 50-100 SUS viscosity, 27 API gravity, and sulfur content over 500 ppm. Precisely matches HTS 2710.19.11.25 for No. 4-type residual fuels in heating applications.