How often should I change my F350 fuel filter?

The answer depends on your engine type and driving conditions. Diesel-powered F-350s (Power Stroke) typically require more frequent changes, often in the 15,000–25,000 mile range, while gasoline-powered F-350s tend to be longer between changes (around 60,000 miles), with adjustments for fuel quality and dusty or harsh driving. Always consult your owner’s manual or your Ford dealer for the exact interval for your year and configuration.

Diesel-powered F-350: typical replacement intervals

Diesel engines use a fuel-filter and water-separator system that is particularly sensitive to water and contaminants. The following intervals reflect common industry guidance, but exact numbers can vary by model year and filter design.

• Primary diesel fuel filter: commonly replaced every 15,000 miles (24,000 km) under normal driving; shorter intervals (about 10,000–15,000 miles) are often recommended in dusty or poor-quality-fuel conditions.


• Water separator/secondary filter: frequently serviced along with the primary filter, with many owners following a 15,000–25,000 mile cadence in normal use; some models specify longer intervals (up to 60,000 miles) between changes—always verify with your manual.


• Water drain and system checks: the separator should be drained as needed during service intervals, especially in climates or setups where water accumulation is more likely.

Understanding these intervals helps prevent fuel delivery problems and protects the high-pressure fuel system common to Power Stroke engines.

Gasoline-powered F-350: typical replacement intervals

Gasoline engines generally use a single inline fuel filter, and the service interval is typically longer than for diesels. The following reflects common practice, with the caveat that exact figures depend on year and model.

• Gasoline inline fuel filter: commonly around 60,000 miles under normal driving; more frequent changes may be advised in severe duty cycles or with poor-quality fuel.


• Special cases: some newer gasoline-only F-350 configurations may have longer intervals or integrated filtration in the fuel pump assembly; always check the owner’s manual for your specific year/model.

In practice, gasoline F-350s can go longer between changes, but performance and reliability depend on fuel quality and local driving conditions.

What affects your fuel filter interval

Several factors can shorten or extend the maintenance window. Here are the key considerations to keep in mind for your F-350.

• Fuel quality and biodiesel content: higher biodiesel blends or contaminated fuel can require earlier changes.


• Driving conditions: frequent short trips, dusty roads, and off-road use increase contaminant exposure and water entry risk.


• Fuel system design and year: newer designs may have different service intervals; see your manual.


• Climate and storage: humid or poor storage conditions can promote water in the fuel and corrosion inside the filter.

Bottom line: if your environment or fuel quality is harsh, plan for more frequent inspections and replacements.

Signs you may need to change the fuel filter sooner

Pay attention to how the truck runs, as symptoms can indicate a clogged or dirty filter before a scheduled change is due.

• Hard starting or extended cranking, especially on diesel models


• Power loss or hesitation under load


• Rough idle or misfires, particularly at low RPM


• Engine stalling or reduced acceleration


• Decreased fuel economy or a warning light related to fuel delivery

If you notice these signs, don’t wait for the next scheduled service—have the fuel system inspected and the filter replaced as needed.

How to approach maintenance safely

Because fuel-system servicing involves pressurized lines and flammable liquids, consider professional service if you’re not fully confident in performing the replacement yourself. Your dealer or a qualified mechanic can confirm the exact interval for your exact year/model and perform the replacement with proper priming and system bleed.

Summary

Fuel filter change intervals for the Ford F-350 vary by engine type and driving conditions. Diesel Power Stroke engines generally require more frequent changes (roughly 15,000–25,000 miles under normal conditions), while gasoline engines typically run longer between changes (around 60,000 miles). Always verify the exact schedule in your owner’s manual and adjust for dusty roads, poor-quality fuel, or heavy towing. Regular maintenance helps protect the fuel system and ensure reliable performance.

How often should you change fuel filters on a diesel truck?

You should change the fuel filter on a diesel truck every 10,000 to 25,000 miles or at least once a year, but check your owner's manual for the specific recommendation for your vehicle. More frequent changes may be necessary if you frequently drive in dusty or dirty conditions or use low-quality fuel. 
This video explains when to change a diesel fuel filter and what factors can affect the frequency: 27sTAT Express Inc.YouTube · Apr 22, 2024
General guidelines

• Standard interval: Change the filter every 10,000 to 25,000 miles or once a year, whichever comes first.
• Check the owner's manual: The manufacturer's recommendation is the most accurate guide for your specific truck. 

Factors that require more frequent changes

• Driving conditions: Dusty, off-road, or humid environments can contaminate fuel faster, requiring more frequent replacement.
• Fuel quality: Using low-quality or contaminated diesel fuel will clog the filter more quickly.
• Heavy loads: Hauling heavy loads puts more stress on the engine and fuel system, which can shorten the filter's life. 

Signs that your fuel filter needs to be changed
Reduced fuel efficiency, Difficulty starting the engine, Rough idling or engine misfires, Loss of power or poor acceleration, and Unusual engine noises or sputtering. 
This video demonstrates how to change a diesel fuel filter and shows an example of a dirty filter: 1mBearded Ford TechYouTube · Nov 10, 2022

How often do you change the fuel filter on a 6.7 powerstroke?

You should change the fuel filters on a 6.7 Powerstroke every 15,000 miles, or every third oil change, whichever comes first. However, some owners and mechanics recommend changing them more frequently, such as every 10,000 miles, especially if you use fuel from various sources or operate the truck in harsh conditions, according to this YouTube video and Reddit users. 
Recommended intervals
This video demonstrates what happens when fuel filters are not changed for a long time: 59sFlying WrenchesYouTube · Oct 31, 2022

• 15,000 miles or every third oil change: This is the interval recommended by some sources like Steve Rogers Ford and Gallatin Ford, Jim Click Ford, and Gallatin Ford. 
• 10,000 miles: Some owners and mechanics suggest changing them this often, particularly if using varied fuel sources, to prevent power loss or other issues, say Facebook users and Reddit users. 
• When the message center indicates: Your vehicle's message center will provide alerts, which can be a good indicator of when a change is needed, notes Steve Rogers Ford. 

Factors that may require more frequent changes

• Poor fuel quality: Using fuel from various stations increases the chance of contaminants like dirt and rust. 
• Severe operating conditions: Frequent towing or driving in extreme weather can cause the filters to clog faster. 
• Using a fuel additive: Some users report good results with additives and 10,000-mile changes. 

This video explains the various intervals for changing fuel filters and other parts on a Ford Super Duty truck: 57sPower Stroke MaintenanceYouTube · Jan 19, 2023

What is the maintenance schedule for a 6.7 powerstroke?

A 6.7 Powerstroke maintenance schedule includes oil and filter changes every 7,500–10,000 miles, fuel filter replacement every 15,000–22,500 miles, and engine air filter inspection at oil changes with replacement around 45,000 miles. Key service intervals also include a coolant flush at 105,000 miles, with subsequent changes every 45,000 miles, and differential and transfer case fluid changes every 50,000 miles. Driving conditions, such as towing, will require more frequent service. 
This video explains the importance of changing fuel filters for the 6.7 Powerstroke engine: 1mPower Stroke MaintenanceYouTube · Jun 9, 2023
7,500 - 10,000 miles 

• Oil and filter: Change the engine oil and filter.
• Tires: Rotate tires and inspect tire tread and wheels.
• Fuel water separator: Drain the fuel water separator. 

15,000 miles 

• Fuel filters: Replace the fuel filters.
• EGR valve: Inspect the EGR valve. 

30,000 miles 

• Air filter: Replace the engine air filter.
• DPF: Clean the Diesel Particulate Filter (DPF).
• Turbocharger: Inspect the turbocharger. 

45,000 miles 

• Coolant: Flush and replace the engine cooling system. 

50,000 miles

• Differential fluid: Change the front and rear differential fluids. 
• Transfer case fluid: Change the transfer case fluid. 
• CCV filter: Consider checking or replacing the Crankcase Ventilation (CCV) filter, especially under severe duty use. 

You can watch this video to learn how to replace the serpentine belt on a 6.7 Powerstroke: 55sPower Stroke MaintenanceYouTube · Jul 12, 2023
100,000 - 105,000 miles

• Coolant: Perform an initial coolant flush and replacement at 105,000 miles or 72 months, if not done earlier. 
• Thermostat: Consider replacing the thermostat. 
• Belts and hoses: Inspect belts and hoses for cracks and wear. 

150,000 miles 

• Transmission fluid: Replace the transmission fluid and filter.
• Belts: Replace the serpentine belt. 

Every 3 years 

• Brake fluid: Change the brake fluid. 

Note: This is a general guideline. Always consult your owner's manual for specific intervals and consider severe duty maintenance recommendations for conditions like heavy towing, frequent short trips, and dusty environments.

How much does it cost to replace a fuel filter on a Ford F350?

The average cost for a Ford F-350 Super Duty Fuel Filter Replacement is between $174 and $265. Labor costs are estimated between $79 and $116 while parts are priced between $95 and $148.