Ford Super Duty (2018 year). Manual — part 109

If you use oil and fluids that do not meet
the defined specification and viscosity
grade, this may lead to:
•

Component damage which is not
covered by the vehicle warranty.

•

Longer engine cranking periods.

•

Increased emission levels.

•

Reduced engine performance.

•

Reduced fuel economy.

•

Degraded brake performance.

Note: An engine block heater is
recommended at temperatures below
–10°F (–23°C).

Engine Oil Specifications

The use of correct oil viscosities for diesel
engines is important for satisfactory
operation. Determine which oil viscosity
best suits the temperature range you
expect to encounter for the next service
interval from the following SAE viscosity
grade chart.

E163370

Note: Ford recommends using DOT 4 Low
Viscosity (LV) High Performance Brake Fluid
or equivalent meeting WSS-M6C65-A2. Use
of any fluid other than the recommended
fluid may cause degraded brake
performance and not meet the Ford
performance standards. Keep brake fluid
clean and dry. Contamination with dirt,
water, petroleum products or other
materials may result in brake system
damage and possible failure.

CAPACITIES AND SPECIFICATIONS - 6.8L

Capacities

WARNING

The air conditioning refrigerant system contains refrigerant under high pressure.
Only qualified personnel should service the air conditioning refrigerant system.
Opening the air conditioning refrigerant system can cause personal injury.

Capacity

Item

7.0 qt (6.6 L)

Engine oil (with oil filter)

26.7 qt (25.3 L)

Engine coolant

Between MIN and MAX on brake fluid

reservoir

Brake fluid

2.7 qt (2.6 L)

Front axle

3.3–3.5 qt (3.1–3.3 L)

Rear axle-10.5 inch (E-Locker)

3.5–3.6 qt (3.3–3.4 L)

Rear axle-10.5 inch (non E-Locker)

3.78 qt (3.58 L)

1

Rear axle-Dana M300

17.4 qt (16.5 L)

2

Automatic transmission fluid

1.9 qt (1.8 L)

Transfer case fluid

Fill as required

Windshield washer fluid

26.5 gal (100.3 L)

Fuel tank (incomplete vehicle, middle
location)

40 gal (151.4 L)

Fuel tank (incomplete vehicle, Aft- axle -
location)

Capacity

Item

27 oz (0.77 kg)

A/C refrigerant

4.1 fl oz (120 ml)

A/C refrigerant compressor oil

1

For complete refill of limited slip Ford axles, add 7.1 fl oz. (210 ml) of Additive Friction

Modifier XL-3 or equivalent, meeting Ford Specification EST-M2C118-A. This added friction
modifier should be included in the total lube volume of 3.78 qt (3.58 L).

2

Approximate dry fill capacity. Actual amount may vary during fluid changes.

Specifications

Materials

Specification

Name

WSS-M2C945-A

Recommended motor oil (U.S.):
Motorcraft® SAE 5W-20 Premium Synthetic Blend Motor
Oil
XO-5W20-QSP

WSS-M2C945-A

Recommended motor oil (Canada):
Motorcraft® SAE 5W-20 Super Premium Motor Oil
CXO-5W20-LSP12

WSS-M2C946-A

Optional motor oil (U.S.):
Motorcraft® SAE 5W-30 Premium Synthetic Blend Motor
Oil
XO-5W30-QSP

WSS-M2C946-A

Optional motor oil (Canada):
Motorcraft® SAE 5W-30 Super Premium Motor Oil
CXO-5W30-LSP12

WSS-M2C946-A

Optional motor oil (U.S.):
Motorcraft® SAE 5W-30 Full Synthetic Motor Oil
XO-5W30-QFS

WSS-M2C946-A

Optional motor oil (Canada):
Motorcraft® SAE 5W-30 Synthetic Motor Oil
CXO-5W30-LFS12

WSS-M97B44-D2

Engine coolant (U.S.):
Motorcraft® Orange Prediluted Antifreeze/Coolant
VC-3DIL-B

WSS-M97B44-D2

Engine coolant (Canada):
Motorcraft® Orange Prediluted Antifreeze/Coolant

Specification

Name

CVC-3DIL-B

WSS-M6C65-A2

Brake fluid:
Motorcraft® DOT 4 Low Viscosity (LV) High Performance
Motor Vehicle Brake Fluid
PM-20

WSP-M2C197-A

Front axle fluid :
Motorcraft® SAE 80W-90 Premium Rear Axle Lubricant
XY-80W90-QL

WSS-M2C942-A

Rear axle fluid (10.50 inch axle) (E-Locker/non E-Locker):
Motorcraft® SAE 75W-85 Premium Synthetic Hypoid
Gear Lubricant
XY-75W85-QL

WSL-M2C192-A

Rear axle fluid (Dana M300 With HD Tow Option) (U.S.):
Motorcraft® SAE 75W-140 Synthetic Rear Axle Lubricant
XY-75W140-Q

WSP-M2C197-A

Rear axle fluid (Dana M300) (U.S.):
Motorcraft® SAE 80W-90 Premium Rear Axle Lubricant
XY-80W90-QL

WSP-M2C197-A

Rear axle fluid (Dana M300) (Canada):
Motorcraft® SAE 80W-90 Premium Rear Axle Lubricant
CXY-80W90-1L

EST-M2C118-A

Friction Modifier
Motorcraft® Additive Friction Modifier
XL-3

WSS-M2C938-A

Automatic transmission fluid (U.S.) :

MERCON LV

Motorcraft® MERCON LV Automatic Transmission Fluid
XT-10-QLVC

WSS-M2C938-A

Automatic transmission fluid (Canada):

MERCON LV

Motorcraft® MERCON LV Automatic Transmission Fluid
CXT-10-LV12

WSS-M2C938-A

Transfer case fluid (U.S.):

MERCON LV

Motorcraft® Transfer Case Fluid
XT-10-QLVC

WSS-M2C938-A

Transfer case fluid (Canada):

MERCON LV

Motorcraft® Transfer Case Fluid
CXT-10-LV12

WSS-M2C938-A

Power steering fluid: