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.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If for heavy marine fuels testing 25° API or higher
API gravity threshold determines distillate vs residual classification in marine fuels.
If crude-derived without refinement
Unrefined petroleum oils remain in crude heading rather than processed distillates.
Not sure which classification is right?
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Import Tips & Compliance
• Provide MARPOL Annex VI sulfur content certification; exceeding limits triggers environmental penalties
• Declare exact biodiesel percentage as it affects base oil constituent calculation for 70% threshold
• Use ISO 8217 test methods for viscosity verification to prevent disputes during customs inspection
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.
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.
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.