User Manual - Page 569

For 2020 Super Duty F-350 XL.

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Towing a Trailer or Using a Car-top Carrier
Replace the wheel bearing grease and grease seals if you
use non-sealed bearings. Two-wheel drive vehicles
Every 30,000 mi
(48,000 km)
Flush and refill the coolant. Do not add coolant additive.Every 60,000 mi
(96,000 km) or 2400
engine hours
Note: After the initial coolant flush and fill at 60,000 mi (96,000 km) or 2400 engine
hours, flush and fill every 45,000 mi (72,000 km) or 1800 engine hours thereafter.
Frequent or Extended Idling - Over 10 Minutes Per Hour of Normal Driving or Frequent
Low-speed Operation if you use your Vehicle for Stationary Operation
Change the engine oil and filter as indicated by the
information display, and perform the services listed in the
scheduled maintenance chart.
As required
Replace the engine-mounted and frame-mounted fuel
filters.
Every 15,000 mi
(24,000 km), six months or
600 engine hours
Flush and refill the coolant. Do not add coolant additive.Every 60,000 mi
(96,000 km) or 2400
engine hours
Note: After the initial coolant flush and fill at 60,000 mi (96,000 km) or 2400 engine
hours, flush and fill every 45,000 mi (72,000 km) or 1800 engine hours thereafter.
Frequent Low-speed Operation, Consistent Heavy Traffic Under 25 mph (40 km/h) or
Long Rush-hour Traffic
Change the engine oil and filter as indicated by the
information display, and perform the services listed in the
scheduled maintenance chart.
As required
Replace the engine-mounted and frame-mounted fuel
filters.
Every 15,000 mi
(24,000 km), six months or
600 engine hours
Flush and refill the coolant. Do not add coolant additive.Every 60,000 mi
(96,000 km) or 2400
engine hours
Note: After the initial coolant flush and fill at 60,000 mi (96,000 km) or 2400 engine
hours, flush and fill every 45,000 mi (72,000 km) or 1800 engine hours thereafter.
566
Super Duty (TFE), enUSA, Edition date: 201909, Third-Printing-
Scheduled Maintenance
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