How big is the fuel tank on a 6.7 powerstroke?
The typical fuel tank for a Ford Super Duty with the 6.7-liter Power Stroke diesel is 34 gallons (about 129 liters).
The exact capacity can vary with model year, cab-and-bed configuration, and any factory or dealer-installed options. This article outlines the standard size and notes where variations can occur, so readers can verify the precise figure for a specific truck.
Standard capacity across most model years
Below is the commonly cited baseline for the 6.7 Power Stroke-equipped Super Duty lineup.
- 34 gallons (approximately 129 liters) is the typical fuel-tank capacity for most 2011–present Ford Super Duty pickups powered by the 6.7L Power Stroke.
In practice, this size covers the vast majority of crew cab, extended cab, and long- or regular-bed configurations sold in the United States with the 6.7L diesel engine.
Notes for owners and shoppers
To confirm the exact tank size for a specific vehicle, check the window sticker (Monroney label) or the official owner’s manual/spec sheet for that model year and configuration. Different trim Levels or market-specific builds can have slight variations, though 34 gallons remains the standard reference for most mainstream US-spec trucks.
Variations and how to verify
While 34 gallons is the prevailing baseline, readers should be aware that some configurations or markets may present differences. The most reliable way to know for sure is to consult official documentation for the exact truck in question.
- Most common configurations in the U.S. still list 34 gallons as the standard capacity.
- Special editions, market-specific variants, or dealer-installed options could alter the stated capacity, albeit rarely.
Always verify with the vehicle’s build sheet or Ford’s technical specifications for the precise figure on a given truck.
Fuel range considerations
Tank size interacts with fuel economy and driving range. Diesel engines like the 6.7 Power Stroke typically offer a wide range between fill-ups, depending on load, terrain, and driving style. A 34-gallon tank, coupled with typical diesel efficiency in real-world use, generally provides hundreds of miles of range between fills, but exact miles will vary by vehicle configuration and use case.
For fleet managers or buyers planning long hauls or heavy towing, factoring in range alongside payload and gross vehicle weight rating helps in choosing the right configuration or considering any available extended-range options or aftermarket solutions (where offered by Ford or third parties).
Summary
The standard fuel-tank size for most 6.7 Power Stroke Ford Super Duty trucks is 34 gallons. While this is the typical figure, always verify the exact capacity for a specific vehicle by checking the owner’s manual, window sticker, or the official Ford spec sheet for that model year and configuration. Understanding the tank size in conjunction with real-world fuel economy and towing needs helps ensure you have the range you expect on the road.
How many miles per gallon does a 6.7 F 250 diesel get?
A Ford F-250 with the 6.7L diesel engine typically gets 18-20 mpg on the highway and 15-18 mpg in mixed city/highway driving when unloaded. Fuel economy drops significantly when towing, with estimates ranging from 8.9 to 12-15 mpg depending on the load. Real-world mileage is affected by driving style, speed, terrain, and other factors.
Unloaded driving
- Highway: Expect around 18-20 mpg on the highway under optimal conditions. Some drivers report getting as high as 24 mpg on highways, particularly with the high-output (HO) engine and gentle driving.
- Mixed/City: You can expect a combined average of 15-18 mpg.
- Factors: Driving speed has a significant impact. Driving at 80 mph can reduce fuel economy compared to driving at 60-65 mph, where you might see higher mileage.
This video shows a real-world fuel economy test of a Ford F-250 diesel truck: 40sSkinner’s DOSEYouTube · Nov 11, 2025
Towing
- Towing MPG: When towing, fuel economy can drop to 12-15 mpg.
- Heavier loads: With very heavy loads (e.g., a 17,000 lb 5th wheel), mileage can drop to under 9 mpg.
This video demonstrates a fuel economy test of a Ford F-250 diesel while towing a trailer: 59sTFLnowYouTube · Apr 9, 2025
Other considerations
- High-output (HO) engine: The high-output version of the 6.7L engine offers more power with little to no difference in fuel consumption compared to the standard engine under normal conditions.
- Engine break-in: New engines may have lower fuel economy until they are broken in.
- DPF delete: Aftermarket modifications like a DPF delete may increase MPG, but this is not recommended for street use.
Do trucks have 30 gallon tanks?
The average fuel tank size for trucks ranges from 20 to 40 gallons.
What truck has a 36 gallon tank?
2025 Ford F-150 STX
2025 Ford F-150 STX w/ Extended Range 36 Gal Fuel Tank. *Please Note: We turn our inventory daily, please check with the dealer to confirm vehicle availability.
How many gallons does a 6.7 Power Stroke hold?
65 gal
Capacities and Specifications - 6.7L Diesel
| Item | Capacity |
|---|---|
| Fuel tank (Large) | 65 gal (246 L) (Liquid capacity) |
| Brake Fluid | Between MIN and MAX on brake fluid reservoir |
| Automatic Transmission Fluid | 16.3 qt (15.4 L)4 |
| Front axle wheel bearing oil (8500 lb axle) | 6–7 fl oz (177–207 ml) |
