2020 Ford F-350 Super Duty: Factory Maintenance Schedule

'''

Quick Reference: 2020 Ford F-350 Super Duty Maintenance Schedule

This table outlines the factory-recommended service intervals for your 2020 F-350 Super Duty with the 6.2L V8, 7.3L V8, or 6.7L Power Stroke diesel engine under normal operating conditions. Severe-duty schedules will require more frequent service.

Severe-Duty Schedule

The "normal" schedule is for highway driving in moderate climates. If you use your F-350 for what it was built for—towing, hauling heavy loads, operating in extreme temperatures, or on dusty/unpaved roads—you must follow the severe-duty schedule. Short trips (under 10 miles), extensive idling, and police/fire/livery use also qualify.

• Engine Oil & Filter: Do not exceed 5,000 miles or 6 months. For the 6.7L diesel, the Intelligent Oil-Life Monitor (IOLM) will likely recommend changes closer to the 5,000-7,500 mile mark.
• Fuel Filter (6.7L Diesel): Change every 15,000-20,000 miles. Dirty fuel is a primary cause of high-pressure fuel system failure.
• Transmission Fluid: Inspect every 30,000 miles. Consider a fluid and filter service every 60,000 miles, especially if towing heavy loads frequently.
• Differential & Transfer Case: Service every 60,000-75,000 miles if frequently towing, off-roading, or launching boats (submerging the rear axle).
• Air Filters (Engine & Cabin): Inspect at every oil change and replace when visibly dirty. In dusty environments, this could be as frequent as every 10,000 miles.

Known Issues by Mileage for the 2020+ Super Duty Generation

While the 2020 models are robust, a few common patterns have emerged:

• 15,000-30,000 Miles: Some owners have noted premature wear on the factory brake pads, especially when towing. The factory cabin air filter is often found to be dirty by 15,000 miles. A recall was issued for some 10-speed transmissions related to a component that could fracture; ensure your vehicle has had this checked.
• 60,000-100,000 Miles: This is the window where the "death wobble"—a violent shaking of the front end after hitting a bump—can appear. It's often caused by worn steering or suspension components like the track bar bushing, ball joints, or steering damper. Ford has issued technical service bulletins (TSBs) to address this.
• 100,000+ Miles: For the 6.7L Power Stroke, this is the mileage where issues with the emissions system (DEF sensors, DPF) may begin to surface, though they can occur earlier. On gas engines, ignition coil failure is a possibility after replacing spark plugs if the coil boots are not handled carefully.

Estimated Cost Per Service (2024 Estimates)

• Basic Service (Oil Change, Tire Rotation): $80 - $150 (Diesel slightly higher)
• Minor Service (30k): $250 - $500 (Includes filters; diesel fuel filter replacement adds cost)
• Major Service (100k - 150k): $800 - $2,500+ (Depending on inclusion of spark plugs, coolant, transmission, and differential services)

What You Can DIY vs. What to Leave to the Shop

• DIY: Changing engine oil and filter, replacing the engine and cabin air filters, and rotating the tires are all achievable for the home mechanic with the right tools (and a large drain pan). Inspecting fluids and belts is also a simple DIY check.
• Shop: Leave fluid flushes (Brake, Coolant, Transmission) and component replacements (Spark Plugs, Belts, PCV Valve, suspension work) to certified technicians. The transmission fluid level check on the 10-speed automatic is complex and requires a scan tool. Differential and transfer case services can be messy and require a fluid pump, making them a job most prefer to have a shop handle.

Book service on Repairius. '''