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How much diesel does a F-350 hold?

The Ford F-350 diesel typically carries a 34-gallon tank, with an optional 48-gallon long-range tank available on select configurations. The exact capacity depends on the model year, cab/bed setup, and trim level.


Overview: In most Ford F-350 Super Duty diesel pickups, the standard fuel tank is 34 gallons (about 128 liters). Ford also offered an optional Long Range Fuel Tank that increases capacity to 48 gallons (about 182 liters) on certain builds. Availability varies by configuration, so the precise figure for a given truck can differ.


Tank capacities by configuration


These figures reflect the main options you’re likely to encounter when shopping for a diesel F-350.



  • Standard fuel tank: 34 gallons (128 L).

  • Optional long-range fuel tank: 48 gallons (181–182 L).

  • Note: Availability depends on cab/bed configuration, year, and trim. Always verify with the vehicle’s window sticker or owner’s manual.


Knowing the baseline capacities helps with trip planning, towing considerations, and fuel budgeting.


Estimated driving range with diesel


Range depends on driving conditions and payload, but these are rough figures to illustrate the impact of tank size on how far you can go between fills.



  • With a 34-gallon tank and highway fuel economy around 18–23 mpg, expected range is roughly 612–782 miles (986–1,260 km).

  • With a 48-gallon tank, using the same mpg range yields approximately 864–1,104 miles (1,390–1,780 km).

  • Real-world range will vary based on terrain, towing, payload, tire size, and drivetrain configuration.


For planning purposes, use your truck’s actual mpg and the exact tank size from your build sheet or window sticker to calculate a precise range.


How to confirm your specific F-350's capacity


To determine the exact fuel capacity for your truck, check these sources:



  • Window sticker on the driver's door jamb for the official capacity and option codes.

  • Owner’s manual or the VIN-based build sheet for precise specifications.

  • Ask a Ford dealer with your VIN to confirm the installed fuel tank option.


Knowing the exact tank size is helpful for maintenance planning, fuel budgeting, and understanding long-range towing capabilities.


Why capacity can vary by year or trim


Ford occasionally updates options and supplies, so some years or trims may not offer the long-range tank. Cab configuration, bed length, and drivetrain can also influence which tank options are available.


Bottom line and summary


In short, the diesel Ford F-350 generally holds 34 gallons, with an optional 48-gallon long-range tank available on select configurations. The precise capacity depends on model year, cab/bed layout, and trim. For the most accurate number, consult the vehicle’s documentation or the dealer using your VIN.


Summary: The F-350’s diesel tank capacity is typically 34 gallons, expandable to 48 gallons with a factory long-range option. Availability varies by configuration, so verify the exact figure on your specific truck.

How many gallons of diesel does a 6.7 powerstroke hold?


A 6.7 Powerstroke's fuel tank capacity varies, but it can be around 29 to 48 gallons for standard models or larger like 60 gallons for crew cab/short bed configurations. The engine also uses a separate 5 to 7.5-gallon tank for Diesel Exhaust Fluid (DEF), which is critical for emissions and must be refilled separately. 
Fuel tank capacity

  • Standard tanks: Typically range from 29 to 48 gallons, depending on the truck's configuration like the wheelbase and bed length. 
  • Aftermarket and larger options: Some trucks can be fitted with replacement tanks that offer capacities of 60 gallons or more. 

Diesel Exhaust Fluid (DEF) tank
  • Standard capacity: The separate DEF tank is usually about 5 gallons, with some models using a larger 7.5-gallon tank.
  • Importance: The DEF system is essential for reducing emissions. If the DEF tank runs out, it can trigger a "limp mode" or prevent the engine from starting. 

Oil capacity
  • Engine oil: The 6.7 Powerstroke engine takes approximately 15 quarts (14.2 gallons) of oil. 



How many gallons does a F-350 diesel hold?


A Ford F-350 diesel holds between 29 and 48 gallons, depending on the model's configuration, such as bed length and cab type. Crew cabs with 8-foot beds typically have a 48-gallon tank, while other configurations may have a 34-gallon or 29-gallon tank. 

  • 48 gallons: Crew cabs with the 8-foot bed. 
  • 34 gallons: Short-bed crew cabs with a 160-inch wheelbase, and Regular/SuperCab models. 
  • 29 gallons: Regular cabs and some other configurations. 
  • Aftermarket tanks: Many aftermarket options are available that provide larger capacities, sometimes 60 gallons or more. 
  • For a definitive answer: To find your specific vehicle's tank size, check the owner's manual or look for a label inside the fuel door. 



Do trucks have 30 gallon tanks?


The average fuel tank size for trucks ranges from 20 to 40 gallons.



How big is the fuel tank on a Ford F-350?


Fuel & MPG

Fuel typeRegular unleaded
Range in miles (city/hwy)0/0 mi.
Fuel tank capacity34.0 gal.


Kevin's Auto

Kevin Bennett

Company Owner

Kevin Bennet is the founder and owner of Kevin's Autos, a leading automotive service provider in Australia. With a deep commitment to customer satisfaction and years of industry expertise, Kevin uses his blog to answer the most common questions posed by his customers. From maintenance tips to troubleshooting advice, Kevin's articles are designed to empower drivers with the knowledge they need to keep their vehicles running smoothly and safely.