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.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If not containing biodiesel
Products without biodiesel fall under non-biodiesel petroleum oils in 2710.19, shifting from biodiesel-specific subheading.
If containing 500 ppm sulfur or less
Lower sulfur variants are classified separately in the same fuel oil category to distinguish environmental compliance grades.
If lighter distillate with 90%+ distilling at 210°C
Light oils meeting ISO 3405 distillation criteria move to 2710.12 light oil subheadings instead of heavier fuel oils.
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Import Tips & Compliance
• Verify sulfur content via ASTM D129 or equivalent testing to confirm >500 ppm and avoid reclassification to low-sulfur subheadings
• Provide detailed refinery certificates and biodiesel blend ratios (70%+ petroleum oils) for customs clearance
• Ensure proper storage tank declarations to prevent mixing with low-sulfur fuels during import
Related Products under HTS 2710.20.10.25
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.
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.