# #4 or #6 Residual heavy fuel oils

*/Products/%234_or_%236_Residual_heavy_fuel_oils*

## Product Bo M

**Input To**:
- [Marine Propulsion](/Processes/Marine_Propulsion)
- [Industrial Steam Generation](/Processes/Industrial_Steam_Generation)
- [Fuel Oil Blending](/Processes/Fuel_Oil_Blending)
**Summary**: Heavy, high-viscosity fractions left after the lighter distillates are removed from crude oil: No. 6 is the near-bottom residue (bunker C) and No. 4 a distillate/residual blend. They are burned in large industrial boilers, marine engines, and furnaces. As bulk liquids they have no assembled bill-of-materials, but they are the residual output of distillation and feed downstream blending and coking.
**Output Of**:
- [Vacuum Distillation](/Processes/Vacuum_Distillation)
- [Crude Oil Refining](/Processes/Crude_Oil_Refining)
**By Product Of**:
- [Motor Gasoline](/Products/Motor_Gasoline)
- [Diesel Fuel](/Products/Diesel_Fuel)
**Delivered As**:
- [Marine Bunkering Service](/Services/Marine_Bunkering_Service)
**Physical Good**: true
**Produced With**:
- [Vacuum Distillation Unit](/Products/Vacuum_Distillation_Unit)
- [Crude Distillation Column](/Products/Crude_Distillation_Column)
**Consumes To Make**:
- [Crude Oil](/Products/Crude_Oil)
- [Vacuum Distillation Bottoms](/Products/Vacuum_Distillation_Bottoms)
**Has Measurement**:
- [Kinematic Viscosity](/Metrics/Kinematic_Viscosity)
- [Sulfur Content](/Metrics/Sulfur_Content)
- [Density](/Metrics/Density)
- [Asphaltene Content](/Metrics/Asphaltene_Content)
**Transforms Into**:
- [Blended Marine Bunker Fuel](/Products/Blended_Marine_Bunker_Fuel)
- [Petroleum Coke](/Products/Petroleum_Coke)

## Neighborhood

### Parent

- [Fuel Oils](/Products/Fuel_Oils) — parent · Products

### Siblings

- [#2 Heating fuel oil](/Products/%232_Heating_fuel_oil) — siblings · Products
- [No.5 Residual heavy fuel oil](/Products/No.5_Residual_heavy_fuel_oil) — siblings · Products
- [Argus Media APIs](/Products/Argus_Media_APIs) — siblings · Products
- [Aviation Turbine Fuel](/Products/Aviation_Turbine_Fuel) — siblings · Products
- [Axxis Fuel Management](/Products/Axxis_Fuel_Management) — siblings · Products
- [Blended Diesel](/Products/Blended_Diesel) — siblings · Products
- [Blended Fuel](/Products/Blended_Fuel) — siblings · Products
- [Blended Fuel Supply](/Products/Blended_Fuel_Supply) — siblings · Products
- [Blended Oil](/Products/Blended_Oil) — siblings · Products
- [Boat Fuel](/Products/Boat_Fuel) — siblings · Products
- [Bobtail Fuel Delivery Trucks](/Products/Bobtail_Fuel_Delivery_Trucks) — siblings · Products
- [Boiler Fuel Handling System](/Products/Boiler_Fuel_Handling_System) — siblings · Products
- [Bulk Diesel Deliveries](/Products/Bulk_Diesel_Deliveries) — siblings · Products
- [Bulk Diesel Fuel](/Products/Bulk_Diesel_Fuel) — siblings · Products
- [Bulk Fuel Delivery Truck](/Products/Bulk_Fuel_Delivery_Truck) — siblings · Products
- [Bulk Fuels and Lubricants](/Products/Bulk_Fuels_and_Lubricants) — siblings · Products
- [Bulk Oil Tanker](/Products/Bulk_Oil_Tanker) — siblings · Products
- [Bunker Barges](/Products/Bunker_Barges) — siblings · Products
- [Bunker Fuel Monitoring Systems](/Products/Bunker_Fuel_Monitoring_Systems) — siblings · Products
- [Burner Fuel](/Products/Burner_Fuel) — siblings · Products
- [Burner Fuel Oil](/Products/Burner_Fuel_Oil) — siblings · Products
- [Burner Fuel System](/Products/Burner_Fuel_System) — siblings · Products
- [Burner Test Fuel](/Products/Burner_Test_Fuel) — siblings · Products
- [Carbon Black Feedstock Oil](/Products/Carbon_Black_Feedstock_Oil) — siblings · Products
- [Coal Tar Light Oil](/Products/Coal_Tar_Light_Oil) — siblings · Products
- [Combustion Fuel Nozzles](/Products/Combustion_Fuel_Nozzles) — siblings · Products
- [Combustion Soot](/Products/Combustion_Soot) — siblings · Products
- [Consumable Fuels and Lubricants](/Products/Consumable_Fuels_and_Lubricants) — siblings · Products
- [Contract Fueling Services](/Products/Contract_Fueling_Services) — siblings · Products
- [Crude Benzol](/Products/Crude_Benzol) — siblings · Products
- [Crude Oil Pipelines](/Products/Crude_Oil_Pipelines) — siblings · Products
- [Crude Oil Tanker](/Products/Crude_Oil_Tanker) — siblings · Products
- [Crude Oil Tankers](/Products/Crude_Oil_Tankers) — siblings · Products
- [DOE Diesel Fuel Index](/Products/DOE_Diesel_Fuel_Index) — siblings · Products
- [DOE Fuel Index](/Products/DOE_Fuel_Index) — siblings · Products
- [DOE Highway Diesel Index](/Products/DOE_Highway_Diesel_Index) — siblings · Products
- [DOE Weekly Diesel Index](/Products/DOE_Weekly_Diesel_Index) — siblings · Products
- [DOE Weekly Fuel Index](/Products/DOE_Weekly_Fuel_Index) — siblings · Products
- [DOE Weekly Retail Price Series](/Products/DOE_Weekly_Retail_Price_Series) — siblings · Products
- [DTN Fuel Buyer](/Products/DTN_Fuel_Buyer) — siblings · Products
- [DTN Fuel Price Feed](/Products/DTN_Fuel_Price_Feed) — siblings · Products
- [DTN FuelBuyer](/Products/DTN_FuelBuyer) — siblings · Products
- [Decoating Kiln Fuel](/Products/Decoating_Kiln_Fuel) — siblings · Products
- [Delivery Vehicle Fuel](/Products/Delivery_Vehicle_Fuel) — siblings · Products
- [Diesel Buses](/Products/Diesel_Buses) — siblings · Products
- [Diesel For Yard Equipment](/Products/Diesel_For_Yard_Equipment) — siblings · Products
- [Diesel Fuel](/Products/Diesel_Fuel) — siblings · Products
- [Diesel Generator Fuel](/Products/Diesel_Generator_Fuel) — siblings · Products
- [Distillate Fuel Oil](/Products/Distillate_Fuel_Oil) — siblings · Products
- [Dryer Furnace Fuel](/Products/Dryer_Furnace_Fuel) — siblings · Products
- [Dryout Burner Fuel](/Products/Dryout_Burner_Fuel) — siblings · Products
- [EFS Fuel Cards](/Products/EFS_Fuel_Cards) — siblings · Products
- [Equipment Diesel Fuel](/Products/Equipment_Diesel_Fuel) — siblings · Products
- [Excel Fuel Logs](/Products/Excel_Fuel_Logs) — siblings · Products
- [FOBAS Fuel Services](/Products/FOBAS_Fuel_Services) — siblings · Products
- [Fossil Fuel](/Products/Fossil_Fuel) — siblings · Products
- [Fuel Bunkering Stations](/Products/Fuel_Bunkering_Stations) — siblings · Products
- [Fuel Burner](/Products/Fuel_Burner) — siblings · Products
- [Fuel Card Systems](/Products/Fuel_Card_Systems) — siblings · Products
- [Fuel Cards](/Products/Fuel_Cards) — siblings · Products
- [Fuel Delivery Fleet](/Products/Fuel_Delivery_Fleet) — siblings · Products
- [Fuel Delivery Tank Truck](/Products/Fuel_Delivery_Tank_Truck) — siblings · Products
- [Fuel Distribution Network](/Products/Fuel_Distribution_Network) — siblings · Products
- [Fuel Docks](/Products/Fuel_Docks) — siblings · Products
- [Fuel Metering Registers](/Products/Fuel_Metering_Registers) — siblings · Products
- [Fuel Meters](/Products/Fuel_Meters) — siblings · Products
- [Fuel Monitoring Dashboard](/Products/Fuel_Monitoring_Dashboard) — siblings · Products
- [Fuel Oil Metering Pump](/Products/Fuel_Oil_Metering_Pump) — siblings · Products
- [Fuel Oil Pump](/Products/Fuel_Oil_Pump) — siblings · Products
- [Fuel Oil Purifier](/Products/Fuel_Oil_Purifier) — siblings · Products
- [Fuel Oil Tank](/Products/Fuel_Oil_Tank) — siblings · Products
- [Fuel Phase](/Products/Fuel_Phase) — siblings · Products
- [Fuel Pricing Terminals](/Products/Fuel_Pricing_Terminals) — siblings · Products
- [Fuel Surcharge Line Item](/Products/Fuel_Surcharge_Line_Item) — siblings · Products
- [Fuel Testing Laboratory](/Products/Fuel_Testing_Laboratory) — siblings · Products
- [Fuel Truck Fleet](/Products/Fuel_Truck_Fleet) — siblings · Products
- [Fuel Validation Test Data](/Products/Fuel_Validation_Test_Data) — siblings · Products
- [Fuel Window](/Products/Fuel_Window) — siblings · Products
- [FuelerLinx Dispatch](/Products/FuelerLinx_Dispatch) — siblings · Products
- [FuelerLinx Platform](/Products/FuelerLinx_Platform) — siblings · Products
- [Fuels Blending Header](/Products/Fuels_Blending_Header) — siblings · Products
- [Furnace Fuel](/Products/Furnace_Fuel) — siblings · Products
- [Fusel Oil](/Products/Fusel_Oil) — siblings · Products
- [Generator Fuel](/Products/Generator_Fuel) — siblings · Products
- [Greenhouse Heating Fuel](/Products/Greenhouse_Heating_Fuel) — siblings · Products
- [Handheld Fuel Logging Terminals](/Products/Handheld_Fuel_Logging_Terminals) — siblings · Products
- [Heat Transfer Oil](/Products/Heat_Transfer_Oil) — siblings · Products
- [Heavy Fuel Oil](/Products/Heavy_Fuel_Oil) — siblings · Products
- [Hot Oil Truck](/Products/Hot_Oil_Truck) — siblings · Products
- [ICIS Pricing](/Products/ICIS_Pricing) — siblings · Products
- [ICIS Pricing Reports](/Products/ICIS_Pricing_Reports) — siblings · Products
- [Independent Fuel Brokers](/Products/Independent_Fuel_Brokers) — siblings · Products
- [Industrial Boiler Fuel](/Products/Industrial_Boiler_Fuel) — siblings · Products
- [Jet A1 Fuel](/Products/Jet_A1_Fuel) — siblings · Products
- [Jones Act Product Tankers](/Products/Jones_Act_Product_Tankers) — siblings · Products
- [Jute Batching Oil](/Products/Jute_Batching_Oil) — siblings · Products
- [Kalibrate Fuel Pricing](/Products/Kalibrate_Fuel_Pricing) — siblings · Products
- [Kiln Fuel](/Products/Kiln_Fuel) — siblings · Products
- [Lamp Fuel](/Products/Lamp_Fuel) — siblings · Products
- [Light Cycle Oil](/Products/Light_Cycle_Oil) — siblings · Products
- [Light Tar Oils](/Products/Light_Tar_Oils) — siblings · Products
- [Liquid Hydrocarbon Fuel](/Products/Liquid_Hydrocarbon_Fuel) — siblings · Products
- [Locomotive Diesel Fuel](/Products/Locomotive_Diesel_Fuel) — siblings · Products
- [Low Sulfur Fuel Oil](/Products/Low_Sulfur_Fuel_Oil) — siblings · Products
- [Manual Fuel Cards](/Products/Manual_Fuel_Cards) — siblings · Products
- [Marine Diesel](/Products/Marine_Diesel) — siblings · Products
- [Marine Gasoline](/Products/Marine_Gasoline) — siblings · Products
- [Middle Distillates](/Products/Middle_Distillates) — siblings · Products
- [Motor Fuel](/Products/Motor_Fuel) — siblings · Products
- [OPIS Price Feeds](/Products/OPIS_Price_Feeds) — siblings · Products
- [OPIS Rack Price Feed](/Products/OPIS_Rack_Price_Feed) — siblings · Products
- [OPIS Rack Pricing](/Products/OPIS_Rack_Pricing) — siblings · Products
- [Oil Analysis Portal](/Products/Oil_Analysis_Portal) — siblings · Products
- [Oil Burner Assembly](/Products/Oil_Burner_Assembly) — siblings · Products
- [Oil Delivery Tank Truck](/Products/Oil_Delivery_Tank_Truck) — siblings · Products
- [Oil Fired Boiler](/Products/Oil_Fired_Boiler) — siblings · Products
- [Oil Meter Readings](/Products/Oil_Meter_Readings) — siblings · Products
- [Optimized Feedstock Blend](/Products/Optimized_Feedstock_Blend) — siblings · Products
- [PDI Fuel Pricing](/Products/PDI_Fuel_Pricing) — siblings · Products
- [Process Fuel](/Products/Process_Fuel) — siblings · Products
- [Propane or Diesel Fuel](/Products/Propane_or_Diesel_Fuel) — siblings · Products
- [RCC Fuel Distribution](/Products/RCC_Fuel_Distribution) — siblings · Products
- [Rack Priced Gasoline](/Products/Rack_Priced_Gasoline) — siblings · Products
- [Refined Fuel Product](/Products/Refined_Fuel_Product) — siblings · Products
- [Refined Product Streams](/Products/Refined_Product_Streams) — siblings · Products
- [Reheat Furnace Fuel](/Products/Reheat_Furnace_Fuel) — siblings · Products
- [Retail Motor Fuel](/Products/Retail_Motor_Fuel) — siblings · Products
- [Rocket Grade Kerosene](/Products/Rocket_Grade_Kerosene) — siblings · Products
- [Rotary Dryer Fuel](/Products/Rotary_Dryer_Fuel) — siblings · Products
- [SAP IS-Oil](/Products/SAP_IS-Oil) — siblings · Products
- [Savin Oil](/Products/Savin_Oil) — siblings · Products
- [Scheduled Fuel Deliveries](/Products/Scheduled_Fuel_Deliveries) — siblings · Products
- [Separated Liquid Hydrocarbon](/Products/Separated_Liquid_Hydrocarbon) — siblings · Products
- [Tanker Fleet](/Products/Tanker_Fleet) — siblings · Products
- [Treated Fuel Charge](/Products/Treated_Fuel_Charge) — siblings · Products
- [Trial Bunker Fuel](/Products/Trial_Bunker_Fuel) — siblings · Products
- [U.S. DOE Diesel Index](/Products/U.S._DOE_Diesel_Index) — siblings · Products
- [U.S. DOE Fuel Index](/Products/U.S._DOE_Fuel_Index) — siblings · Products
- [Ultra Low Sulfur Diesel](/Products/Ultra_Low_Sulfur_Diesel) — siblings · Products
- [Veritas Petroleum Services](/Products/Veritas_Petroleum_Services) — siblings · Products
- [WEX Fleet Card Portals](/Products/WEX_Fleet_Card_Portals) — siblings · Products
- [World Fuel Services](/Products/World_Fuel_Services) — siblings · Products

### Produced with

- [Vacuum Column](/Products/Vacuum_Column) — produced with · Products
- [Heated Storage Tank](/Products/Heated_Storage_Tank) — produced with · Products

### Input to

- [Marine Fuel Dispensing](/Processes/Marine_Fuel_Dispensing) — input to · Processes
- [Combustion Heating](/Processes/Combustion_Heating) — input to · Processes

### Output of

- [Crude Distillation and Refining](/Processes/Crude_Distillation_and_Refining) — output of · Processes

### By product of

- [Petroleum coke or pet coke](/Products/Petroleum_coke_or_pet_coke) — by product of · Products

### Consumes

- [Cutter Stock](/Products/Cutter_Stock) — consumes · Products
- [Crude oil](/Products/Crude_oil) — consumes · Products

### Measured by

- [Ash Content](/Metrics/Ash_Content) — measured by · Metrics
- [Pour Point](/Metrics/Pour_Point) — measured by · Metrics
- [Sulfur Content](/Metrics/Sulfur_Content) — measured by · Metrics
- [Kinematic Viscosity](/Metrics/Kinematic_Viscosity) — measured by · Metrics

### Delivered as

- [Bulk Fuel Delivery Service](/Services/Bulk_Fuel_Delivery_Service) — delivered as · Services

### Transforms into

- [Marine Propulsion Power](/Products/Marine_Propulsion_Power) — transforms into · Products
- [Process Heat](/Products/Process_Heat) — transforms into · Products

### Packaged in

- [Bulk Barge Cargo](/Products/Bulk_Barge_Cargo) — packaged in · Products