2015 Ford F-350 Super Duty - Factory Maintenance Schedule

Quick Reference: 2015 Ford F-350 Maintenance

Severe-Duty Schedule

The standard maintenance schedule is a good starting point, but "severe duty" conditions warrant more frequent service. These include:

• Towing and Hauling: If you regularly tow heavy trailers or carry maximum payloads, cut the oil change interval in half. Consider a 5,000-mile interval for transmission fluid service, especially if you're towing in hilly terrain or hot climates.
• Dusty Environments: Off-road or construction site use means more frequent engine and cabin air filter changes. Check them at every oil change and replace as needed.
• Short Trips & Extended Idling: If your F-350 is a work truck that sees a lot of stop-and-go or extended idling, follow the severe-duty oil change interval (typically 5,000 miles or as indicated by the oil life monitor).
• Cold Climates: Extreme cold can be hard on batteries and fluids. Ensure your coolant is mixed to the proper concentration and that your battery terminals are clean and tight.

Known Issues by Mileage

• 30,000-60,000 Miles: The 6.7L Power Stroke diesel is known for issues with the emissions system, particularly the DPF (Diesel Particulate Filter) and EGR (Exhaust Gas Recirculation) valve. Symptoms include reduced power and a check engine light.
• 60,000-100,000 Miles: Turbocharger failures can occur, often due to coking (oil buildup) in the turbo's oil lines. Using high-quality synthetic oil and adhering to strict oil change intervals can help mitigate this.
• 100,000+ Miles: Suspension components like ball joints, tie rod ends, and shocks will likely show wear. "Death wobble" (a violent shaking of the front end) is a known issue, often caused by worn track bar bushings or a failing steering damper. The 6R140 transmission is robust, but solenoids and the torque converter can be weak points at higher mileage.

Estimated Cost Per Service

• Oil & Filter Change: $75-$150 (diesel will be on the higher end).
• Fuel Filter Replacement: $150-$300.
• Transmission Fluid Service: $250-$500.
• Coolant Flush: $200-$400.
• Differential Service: $150-$300 per axle.
• Spark Plugs (Gas V8): $300-$600.

What You Can DIY vs. Shop

• DIY: Oil and filter changes, engine and cabin air filter replacement, and tire rotations are all very DIY-friendly. With the right tools, you can also tackle brake pads/rotors and shocks/struts.
• Shop: Transmission and differential fluid changes can be messy without a lift. Coolant, brake fluid, and power steering flushes are also best left to the pros due to the need for specialized equipment to properly bleed the systems. Timing chain and other major engine work should always be handled by a certified technician.

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