2021 FORD SUPER DUTY engine

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Page 582 of 666

FORD SUPER DUTY 2021  Owners Manual 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 servi

Page 583 of 666

FORD SUPER DUTY 2021  Owners Manual Sustained High-speed Driving at Gross Vehicle Weight Rating (Maximum Loaded Weight
for Vehicle Operation)
Inspect the engine and secondary cooling system coolant
concentration (freeze-point protection

Page 584 of 666

FORD SUPER DUTY 2021  Owners Manual Operating in Dusty or Sandy Conditions (Such as Unpaved or Dusty Roads)
Change the engine oil and filter. 2
Every 7,500 mi (12,000 km),
six months or 300 engine
hours
Inspect and lubricate the U-joint

Page 585 of 666

FORD SUPER DUTY 2021  Owners Manual Off-road Operation
Change the rear axle fluid (Dana rear axles only - some F-
350s; all F-450s and F-550s).
Every 50,000 mi
(80,000 km)
Change the transfer case fluid. (Four-wheel drive vehicles)
Insp

Page 586 of 666

FORD SUPER DUTY 2021  Owners Manual specification WSL-M2C192-A, part number
XY-75W140-QL, or equivalent. Add friction
modifier XL-3 (EST-M2C118-A) or
equivalent for complete refill of
Traction-Lok rear axles.  See Capacities
and Specifi

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FORD SUPER DUTY 2021  Owners Manual END USER LICENSE
AGREEMENT
VEHICLE SOFTWARE END USER
LICENSE AGREEMENT (EULA)
•
You (“You”  or “Your ” as applicable)
have acquired a vehicle having several
devices, including SYNC ® and va

Page 632 of 666

FORD SUPER DUTY 2021  Owners Manual 1. Safe and Lawful Use
You acknowledge that devoting attention
to the TeleNav Software may pose a risk
of injury or death to you and others in
situations that otherwise require your
undivided attentio

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FORD SUPER DUTY 2021  Owners Manual HERE holds a non-exclusive license from
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©United States Postal Service® 2014.
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