How big is the tank on a 6.7 powerstroke?
Most Ford Super Duty pickups powered by the 6.7L Power Stroke diesel use a 34-gallon fuel tank, with a 48-gallon long-range option available on select configurations. Exact capacity depends on model year, cab/bed layout, and trim.
What you’re asking about isn’t the engine itself but the vehicle’s fuel-tank capacity. Because Ford offered different tank options across years and body styles, the precise size can vary. To know your truck’s exact number, you’ll want to check the VIN-based build sheet or the dealer documentation for your specific configuration.
Tank size by configuration
Because the tank size varies with year, cab/bed configuration, and trim level, here is a quick overview of what most owners encounter in recent model years.
- Standard configuration: 34 gallons (approximately 128 liters) is typical on most 6.7L Power Stroke-equipped F-250/F-350 Super Duty trucks.
- Long-range option: 48 gallons (approximately 181 liters) is available on select configurations to extend driving range for heavy-duty use.
- Variations by year and setup: Some builds—especially older models or region-specific configurations—may show different capacities; always confirm for your exact vehicle.
The above outlines the common baselines buyers should expect, but exact numbers can differ by year and body style. If in doubt, verify with official build data or a dealer before planning long trips or heavy towing.
How to verify your vehicle's tank size
Use trusted sources to confirm the precise capacity for your particular truck configuration.
- Check the owner's manual or the fuel-tank sticker in the fuel-fill area for the listed capacity.
- Look up the VIN in Ford’s official build data or ask a dealer to pull the specific configuration sheet for your truck.
- Ask the dealership about the presence of a long-range 48-gallon tank option or any regional variations tied to your VIN.
Confirming the exact tank size is especially useful for planning long trips, fuel budgeting, and understanding the vehicle’s towing range under different loads and terrains.
Summary
The 6.7 Power Stroke’s fuel tank is typically 34 gallons, with an optional 48-gallon long-range tank available on certain configurations. Exact capacity varies by model year, cab/bed layout, and trim. Always verify the precise figure for your vehicle using the VIN/build sheet or your dealer to ensure accurate range estimates and fueling plans.
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) |
How big is the gas tank on a Ford F-250 diesel?
The standard fuel tank size for a Ford F-250 diesel varies by model year and configuration, but a common standard is 34 gallons. However, larger optional tanks, such as 48 gallons, are available depending on the model year and specific options. Some model years have a smaller standard tank, around 29 gallons.
Standard and optional tank sizes by configuration
- Standard tank: Varies by year, often around 34 gallons for recent models, but can be as small as 29 gallons.
- Optional tanks: Ford has offered larger optional tanks, such as a 48-gallon tank, on some configurations.
- Cab and bed configurations: The specific tank size can depend on the cab and bed length. For example, a 2018 F-250 Super Cab likely came with a 34-gallon tank, according to Kelley Blue Book.
- Cab & Chassis models: Some aftermarket tanks may not fit Cab & Chassis models.
- Aftermarket tanks: Aftermarket options are available in various sizes to increase capacity. Examples include 55, 60, and 68-gallon tanks, with these sizes often depending on the specific model year and cab/bed configuration, as noted by TITAN Fuel Tanks and TankAndBarrel.com.
To find the exact tank size for a specific truck, consult the vehicle's owner's manual or the original window sticker.
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.
