No. 4 Ultra-Low Sulfur Industrial Fuel Oil
Industrial-grade No. 4 fuel oil blended with biodiesel, featuring ≤500 ppm sulfur, 25°+ API gravity, and 45-125 SUS viscosity at 37.8°C for use in boilers and heavy machinery. Classified under 2710.20.10.15 for its low-sulfur profile, specific physical properties, and predominant petroleum oil composition.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If without biodiesel and higher viscosity
Non-biodiesel No. 4 oils go to 2710.19; viscosity >125 SUS shifts subheading
If primarily for road motor vehicles
Gasoline/motor oils (even low sulfur) classify under 2709 if intended for vehicle engines
If lubricating oil preparations
If marketed/functionally as lubricants rather than fuel, shifts to lubricating oil subheadings
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
• Submit ASTM D396-compliant test reports for viscosity, API gravity, and sulfur to avoid misclassification
• Confirm biodiesel derivation from Chapter 27 note (mono-alkyl esters) with supplier affidavits
Related Products under HTS 2710.20.10.15
No. 4 Low-Sulfur Marine Fuel Oil
A No. 4-type distillate fuel oil with Saybolt Universal viscosity between 45-125 seconds at 37.8°C, testing 25° API or more, and containing ≤500 ppm sulfur, designed for marine bunker use. It falls under HTS 2710.20.10.15 due to its specific viscosity, gravity, biodiesel content (≥70% petroleum oils), and low sulfur specification for environmental compliance.
Low-Sulfur No. 4 Generator Fuel Oil
No. 4 diesel blend with biodiesel for backup generators, ≤500 ppm sulfur, ≥25° API, 45-125 SUS viscosity. Meets HTS 2710.20.10.15 criteria for low-sulfur, biodiesel-containing residual/distillate fuel oils.
B20 No. 4 Low-Sulfur Fuel Oil Blend
20% biodiesel (B20) blended No. 4 fuel oil with ≤500 ppm sulfur, 25°+ API gravity, and 45-125 SUS at 37.8°C for industrial burners. Classified in 2710.20.10.15 for biodiesel fuel oils meeting exact physical specs.
Biodiesel-Blended No. 4 Heating Fuel Oil
A low-sulfur (≤500 ppm) No. 4 heating oil with biodiesel, 25°+ API, and viscosity 45-125 SUS at 37.8°C, used in commercial heating systems. HTS 2710.20.10.15 applies due to its fuel oil specs, biodiesel inclusion, and sulfur limit per subheading requirements.
Eco No. 4 Boiler Fuel Oil ULS
Ultra-low sulfur (≤500 ppm) No. 4 boiler fuel with biodiesel, viscosity 45-125 SUS, ≥25° API, for stationary combustion. HTS 2710.20.10.15 due to sulfur limit and biodiesel in ≥70% petroleum base.