No. 4 Fuel Oil Ultra-Low Sulfur
A medium-viscosity distillate fuel oil derived from petroleum refining, testing 25 degrees A.P.I. or more with Saybolt Universal viscosity at 37.8°C between 45 and 125 seconds, containing ≤500 ppm sulfur. Classified under HTS 2710.19.11.15 due to its specifications as a No. 4-type fuel oil for industrial heating and power generation. Used primarily in boilers and large burners where low sulfur reduces emissions.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If sulfur content exceeds 500 ppm but ≤1,000 ppm
Higher sulfur variants of No. 4 fuel oils shift to 2710.19.11.10 due to less stringent emission specs.
If viscosity <45 SUS at 37.8°C
Lower viscosity No. 4-type oils fall under 2710.19.15 as lighter distillates.
If 90%+ distills at ≤210°C (light oils)
Meets light oil definition per subheading note, reclassifying from residual-type to distillates in 2710.12.
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 20846 or ASTM D5453 testing; certificates required for customs clearance to confirm ≤500 ppm
• Provide detailed specification sheets including A.P.I. gravity, viscosity at 37.8°C, and flash point to avoid reclassification
Related Products under HTS 2710.19.11.15
Blended No. 4-Type Boiler Fuel Ultra Low S
Blended distillate and residual petroleum oils forming No. 4 fuel with 25+° A.P.I., 45-125 seconds SUS at 37.8°C, ≤500 ppm sulfur for emission compliance. HTS 2710.19.11.15 applies as it meets exact viscosity and sulfur limits for this subheading. Essential for large-scale boiler operations in utilities.
Power Plant No. 4 Distillate Fuel Low S
Distillate-heavy No. 4 fuel oil for power generation turbines, with A.P.I. ≥25°, viscosity 45-125 SUS at 37.8°C, sulfur ≤500 ppm. HTS 2710.19.11.15 due to matching subheading for low-sulfur No. 4-type oils. Optimized for peaking plants and backup generators.
Industrial No. 4 Heating Oil Low Sulfur
Petroleum-based No. 4 fuel oil for commercial heating systems, with ≥25° A.P.I., 45-125 SUS viscosity at 37.8°C, and sulfur ≤500 ppm. Falls under HTS 2710.19.11.15 as a distillate/residual blended fuel oil not elsewhere specified, excluding biodiesel or waste. Commonly used in manufacturing plants and district heating.
Marine No. 4 Fuel Oil Low Sulfur Compliant
Low-sulfur No. 4 petroleum fuel oil for auxiliary marine engines, ≥25° A.P.I., 45-125 SUS viscosity, ≤500 ppm S to meet harbor regulations. Classified in HTS 2710.19.11.15 for its precise fuel oil parameters excluding biodiesel. Used in inland waterway vessels and port operations.