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.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If No. 2 or lighter distillate viscosity
Lower viscosity fuels like No. 2 diesel classify in lighter distillate subheadings.
If <70% petroleum oils with additives dominating
Preparations where additives exceed 30% petroleum oils move to biodiesel mixtures in Chapter 38.
If lubricating base oils rather than fuel
Products intended for lubrication rather than combustion fall under lubricating oil provisions.
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Import Tips & Compliance
• Submit Saybolt viscosity and API gravity test results from accredited labs to validate No. 4 specifications
• Label containers clearly with sulfur content and biodiesel ratio to facilitate CBP examination
• Check state-level sulfur regulations that may require additional filtration post-import
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.
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.
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.