Ford Super Duty F-350 maintenance: the schedule, the costs, the traps
A heavy-duty full-size pickup (SRW or dually/DRW) with a diesel powertrain. Below: the service intervals with real cost ranges, the repairs Super Duty F-350 owners actually report, and when a fleet operator would sell. Same data Carlyle uses to score fleet buys.
Service schedule
What it needs, and what that runs
| Interval | Service | Typical cost |
|---|---|---|
| 7,500 mi / 6 mo | Diesel oil + filter (6.7L Power Stroke, ~13 qt); rotate tires (6 on dually); drain water separator; brake & chassis inspection | $160-$350 |
| 15,000 mi | Primary + secondary diesel fuel filter replacement; inspect air filter | $90-$220 |
| 30,000 mi | Engine + cabin air filters; inspect transfer case & axle fluids; DEF system check | $160-$380 |
| 60,000 mi | Coolant condition test; differential fluids (heavier duty on DRW); turbo/EGR inspection | $280-$550 |
| 100,000 mi | Coolant change; TorqShift 10R140 fluid + filter; transfer-case fluid; glow-plug inspection | $550-$1,100 |
Known repair windows
What Super Duty F-350 owners actually run into
Mileage ranges where these repairs typically show up. Buying above a window is not automatically a pass - it just needs to be priced in.
CP4.2 high-pressure fuel pump failure
high severity0-150,000 mi · $8,000-$12,000 catastrophic
Metal debris destroys full fuel system; heavy tow/high-mile trucks especially — clean fuel, frequent filters, lift pump reduce risk
DPF/EGR clogging & incomplete regens
medium severity60,000-150,000 mi · $1,000-$4,000
Aggravated by idling/short hauls; DPF or EGR cooler service
Turbo (VGT) & injector wear
medium severity100,000-180,000 mi · $1,500-$4,000
Higher duty cycle on 1-ton hauling accelerates wear
Front-axle death wobble / steering wear
medium severity40,000-120,000 mi · $300-$1,200
Track bar, damper, ball joints; heavier front axle on 4x4 dually
Brakes & clutch/driveline wear under max load
medium severity40,000-100,000 mi · $600-$2,500
1-ton payload/tow shortens brake and driveline life vs F-250
Operator notes
In production. Mechanically shares the F-250's 6.7L Power Stroke diesel (plus optional gas 6.8L/7.3L V8) and 10R140 transmission, but F-350 is a 1-ton with higher GVWR/payload and dual-rear-wheel (dually) option — heavier axles, 6 tires, and load-driven brake/driveline wear. Diesel service: DEF, DPF regen, fuel filters every 15-20k, glow plugs, timing gears (no belt). Oil 7,500 normal / 5,000 severe-tow.
When the smart money sells
On fleet math, a diesel Super Duty F-350 retires around 95,000 miles - but the exit window opens earlier here: inside the CP4.2 high-pressure fuel pump failure risk window ($8,000-$12,000 catastrophic). Carlyle's garage tracks this per car, against your actual odometer.
Cost ranges are typical US independent-shop estimates and vary by region and condition. Modeling, not mechanic advice - always confirm against your car's service records.
More Ford guides
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