2023 Ford F-350 Super Duty Factory Maintenance Schedule

As an ASE-certified master technician, I know that your 2023 Ford F-350 Super Duty is a massive investment and an essential tool for your livelihood. Whether you’ve got the 6.8L V8, the 7.3L “Godzilla” gas engine, or the legendary 6.7L Power Stroke diesel, keeping up with factory-spec maintenance is the only way to ensure it survives heavy towing, hauling, and daily abuse.

Below is the comprehensive maintenance schedule for the 2023 Ford F-350 based on Ford’s factory recommendations. Note: Ford uses the Intelligent Oil-Life Monitor (IOLM) to indicate when an oil change is due, which will never exceed 10,000 miles or 12 months for gas engines, and generally ranges from 7,500 to 10,000 miles for diesels under normal use.

Quick reference

Note: Brake fluid should be flushed every 3 years regardless of mileage to prevent moisture buildup.

Severe-duty schedule

Most Ford F-350s are used for what Ford considers "severe duty." This includes frequent towing, hauling heavy loads, extensive idling, off-road or dusty conditions, and short trips in freezing climates. If you use your Super Duty like a Super Duty, adjust your intervals as follows:

• Oil and Filter: The IOLM will likely trigger between 5,000 and 7,500 miles. Do not exceed 5,000 miles if primarily towing or idling.
• Diesel Fuel Filters: Under heavy towing or use of bio-diesel (up to B20), replace the upper and lower fuel filters every 10,000 to 15,000 miles.
• Transmission Fluid: The 10-speed TorqShift transmission fluid and filter should be changed every 30,000 to 60,000 miles (instead of 150,000) if you are constantly towing heavy loads.
• Axle / Differential & Transfer Case Fluid: Replace every 60,000 miles (or 3,000 hours) when primarily towing or operating in dusty/water-fording conditions.
• Air Filters: Check cabin and engine air filters at every oil change in dusty conditions. Replace every 15,000 miles as needed.

Known issues by mileage

The 2023 model year introduced an updated Super Duty, but it still shares proven powertrain components with the previous generation. Here is what to watch out for:

• 10,000 - 30,000 Miles: Keep an eye on the 10-speed automatic transmission. While highly robust, early mileage can sometimes reveal harsh shifting or hesitation, which is often resolved with a TCM (Transmission Control Module) software flash at the dealer.
• 40,000 - 60,000 Miles (Diesel): Emissions equipment. The Diesel Particulate Filter (DPF) and Diesel Exhaust Fluid (DEF) systems can experience sensor faults (NOx sensors, EGT sensors) if the truck sees too much idling and not enough highway use to complete active regens.
• 80,000 - 100,000 Miles: Suspension wear. F-350s carry massive unsprung weight. By this mileage, expect to replace shocks, inspect track bar bushings, and check tie rod ends to prevent "death wobble," a common trait in solid front axle trucks. Check for exhaust manifold bolt failure on the 7.3L gas engine.

Estimated cost per service

Prices vary based on engine type (gas vs. diesel) and local labor rates.

• Standard Oil Change (Gas): $80 - $120
• Standard Oil Change (Diesel): $150 - $225 (Requires 13-15 quarts of heavy-duty oil).
• Diesel Fuel Filter Change (Upper & Lower): $150 - $250
• Transmission Fluid Service (10-speed): $350 - $500
• Coolant Flush: $180 - $250
• Spark Plug Replacement (6.8L / 7.3L Gas): $300 - $450
• Differential/Transfer Case Service: $200 - $350 (per axle/unit)

What you can DIY vs shop

What you can DIY: If you are handy, basic maintenance on the F-350 is very straightforward due to the ample ground clearance. Gas engine oil changes, cabin air filters, and engine air filters take minutes. Even the diesel fuel filters (one on the frame rail, one under the hood) are accessible for a DIYer, provided you prime the fuel system properly by cycling the ignition before starting the truck to prevent HPFP (High-Pressure Fuel Pump) damage.

What you should leave to the shop: Transmission fluid services on the 10R140 transmission require precise temperature monitoring to get the fluid level correct; overfilling or underfilling can cause catastrophic transmission failure when towing. Brake fluid flushes (especially on trucks with advanced ABS/trailer sway modules) and coolant flushes (especially the diesel’s complex multi-radiator system) are best handled by a professional shop with vacuum bleeding equipment. Spark plugs on the massive V8s can also be tricky near the firewall.

When your Super Duty is ready for its next interval, don't trust it to just anyone. Book service on Repairius.