Industrial No. 4 Heating Oil
Heavy distillate fuel oil for industrial boilers with Saybolt viscosity 45-125 seconds at 37.8°C and API <25°, precisely matching HTS 2710.20.0510 for No. 4-type oils. May include biodiesel blends not classified as waste.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If testing 25 degrees A.P.I. or higher
Lighter API gravity shifts to different distillate fuel oil subheading.
If sold as petroleum bitumen blend
Bitumen-dominant preparations move to bituminous mixtures heading.
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 D88 viscosity test results with entry; discrepancies lead to 10-20% duty adjustments
• Verify no waste oil contamination via flash point testing (>55°C minimum for safety classification)
• For bulk imports, ensure terminal storage compatibility to avoid contamination reclassification
Related Products under HTS 2710.20.05.10
No. 4 Fuel Oil (Standard Grade)
A medium-viscosity distillate fuel oil with a Saybolt Universal viscosity at 37.8°C between 45 and 125 seconds, classified under HTS 2710.20.0510 due to its API gravity under 25 degrees and specific viscosity range defining No. 4-type fuel oils. Primarily used for industrial heating and marine applications where higher viscosity provides stable combustion.
Blended No. 4 Marine Bunker Fuel
A No. 4-type fuel oil blended for marine bunker use, meeting the 45-125 SUS viscosity at 37.8°C and under 25° API per HTS 2710.20.0510 criteria. Contains permitted biodiesel and bituminous mineral oils for ship propulsion in intermediate ports.
Power Plant No. 4 Residual Fuel
Residual-type No. 4 fuel oil for power generation, with precise 45-125 SUS viscosity at 37.8°C and sub-25° API gravity under HTS 2710.20.0510. Blended from bituminous minerals for high-energy stationary engines.
No. 4-Type Bituminous Fuel Oil
Fuel oil derived from bituminous minerals meeting No. 4 specifications: 45-125 SUS at 37.8°C, API under 25°, classified HTS 2710.20.0510. Used in asphalt plants and heavy machinery.
Biodiesel-Blended No. 4 Fuel Oil
No. 4-type fuel oil containing biodiesel (mono-alkyl esters) with 70%+ petroleum oils, viscosity 45-125 SUS at 37.8°C, API <25° per HTS 2710.20.0510. Designed for compliant low-emission industrial burners.