
•Air in the fuel system, due to looseconnections.
•An open or pinched sensor hose.
•Check engine oil level.
•Wrong fuel or oil viscosity for theclimatic conditions.
If these checks do not help you correct theengine performance problem you areexperiencing, have your vehicle checkedas soon as possible.
Noise Emissions Warranty, ProhibitedTampering Acts and Maintenance
On January 1, 1978, Federal regulationbecame effective governing the noiseemission on vehicles weighing over10,000 lb (4,536 kg) Gross Vehicle WeightRating. The preceding statementsconcerning prohibited tampering acts andmaintenance, and the noise warrantyfound in the Warranty Guide, areapplicable to complete chassis cabs over10,000 lb (4,536 kg) Gross Vehicle WeightRating.
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Fuel and Refueling

CapacityItem
27 oz (0.77 kg)A/C refrigerant
4.1 fl oz (120 ml)A/C refrigerant compressor oil
*For complete refill of limited slip Ford axles add 8.8 fl oz. (260ml) of Additive FrictionModifier XL-3 or equivalent meeting Ford Specification EST-M2C118-A.**Approximate dry fill capacity. Actual amount may vary during fluid changes.
Specifications
Materials
SpecificationName
WSS-M2C946-ARecommended motor oil (U.S.):Motorcraft® SAE 5W-30 Premium Synthetic Blend MotorOilXO-5W30-QSP
WSS-M2C946-ARecommended motor oil (Canada):Motorcraft® SAE 5W-30 Super Premium Motor OilCXO-5W30-LSP12
WSS-M2C946-AOptional motor oil (U.S.):Motorcraft® SAE 5W-30 Full Synthetic Motor OilXO-5W30-QFS
WSS-M2C946-AOptional motor oil (Canada):Motorcraft® SAE 5W-30 Synthetic Motor OilCXO-5W30-LFS12
WSS-M97B44-D2Engine coolant (U.S.):Motorcraft® Orange Prediluted Antifreeze/CoolantVC-3DIL-B
WSS-M97B44-D2Engine coolant (Canada):Motorcraft® Orange Prediluted Antifreeze/CoolantCVC-3DIL-B
WSS-M6C65-A2Brake fluid:Motorcraft® DOT 4 Low Viscosity (LV) High PerformanceMotor Vehicle Brake FluidPM-20
WSP-M2C197-AFront axle fluid :Motorcraft® SAE 80W-90 Premium Rear Axle LubricantXY-80W90-QL
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Capacities and Specifications

If you use oil and fluids that do not meetthe defined specification and viscositygrade, this may lead to:
•Component damage which is notcovered by the vehicle warranty.
•Longer engine cranking periods.
•Increased emission levels.
•Reduced engine performance.
•Reduced fuel economy.
•Degraded brake performance.
We recommend Motorcraft® motor oil foryour vehicle. If Motorcraft® oil is notavailable, use motor oils of therecommended viscosity grade that meetAPI SN requirements and display the APICertification Mark for gasoline engines. Donot use oil labeled with API SN servicecategory unless the label also displays theAPI certification mark.
An oil that displays this symbol conformsto current engine, emission system andfuel economy performance standards ofthe International Lubricants SpecificationAdvisory Committee (ILSAC).
Do not use supplemental engine oiladditives because they are unnecessaryand could lead to engine damage that maynot be covered by your vehicle warranty.
Note:Ford recommends using DOT 4 LowViscosity (LV) High Performance Brake Fluidor equivalent meeting WSS-M6C65-A2. Useof any fluid other than the recommendedfluid may cause degraded brakeperformance and not meet the Fordperformance standards. Keep brake fluidclean and dry. Contamination with dirt,water, petroleum products or othermaterials may result in brake systemdamage and possible failure.
Note: Automatic transmissions that requireMERCON® LV transmission fluid shouldonly use MERCON® LV transmission fluid.The use of any other fluid may causetransmission damage.
Alternative Engine Oil forExtremely Cold Climates
To improve engine cold start performance,we recommend that you use the followingalternative engine oil in extremely coldclimates, where the ambient temperaturereaches -22.0°F (-30°C) or below.
Materials
SpecificationName
WSS-M2C953-A1Motorcraft® SAE 0W-30 Premium Synthetic Blend Motor Oil:Engine Oil - SAE 0W-30XO-0W30-QSP
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Capacities and SpecificationsE142732

1See the SAE viscosities grades chart forcorrect temperature usage.2For severe duty service, use SAE 5W-40API CJ-4.3For biodiesel fuel blends (B20 max), useSAE 5W-40 or SAE 15W-40 API CJ-4.
If you use oil and fluids that do not meetthe defined specification and viscositygrade, this may lead to:
•Component damage which is notcovered 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 isrecommended at temperatures below–10°F (–23°C).
Engine Oil Specifications
The use of correct oil viscosities for dieselengines is important for satisfactoryoperation. Determine which oil viscositybest suits the temperature range youexpect to encounter for the next serviceinterval from the following SAE viscositygrade chart.
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Capacities and SpecificationsE163370

The American Petroleum Institute (API)service symbol is used to identify theproper engine oil for your engine. The APIservice symbol will be displayed on the oilcontainer you purchase. The API symboldisplays the oil performance category inthe top half of the symbol and the viscositygrade in the center of the symbol.
Note:Ford recommends using DOT 4 LowViscosity (LV) High Performance Brake Fluidor equivalent meeting WSS-M6C65-A2. Useof any fluid other than the recommendedfluid may cause degraded brakeperformance and not meet the Fordperformance standards. Keep brake fluidclean and dry. Contamination with dirt,water, petroleum products or othermaterials may result in brake systemdamage 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.
CapacityItem
7.0 qt (6.6 L)1Engine oil (with oil filter)
26.7 qt (25.3 L)Engine coolant
Between MIN and MAX on brake fluidreservoirBrake 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)
3.8 qt (3.63 L)Rear axle-Dana M275
4.5 qt (4.26 L)2Rear axle-Dana M300
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Capacities and SpecificationsE163371

SpecificationName
XO-5W30-QSP
WSS-M2C946-A1Recommended motor oil (Canada):Motorcraft® SAE 5W-30 Super Premium Motor OilCXO-5W30-LSP12
WSS-M2C946-A1Optional motor oil (U.S.):Motorcraft® SAE 5W-30 Full Synthetic Motor OilXO-5W30-QFS
WSS-M2C946-A1Optional motor oil (Canada):Motorcraft® SAE 5W-30 Synthetic Motor OilCXO-5W30-LFS12
WSS-M97B44-D2Engine coolant (U.S.):Motorcraft® Orange Prediluted Antifreeze/CoolantVC-3DIL-B
WSS-M97B44-D2Engine coolant (Canada):Motorcraft® Orange Prediluted Antifreeze/CoolantCVC-3DIL-B
WSS-M6C65-A2Brake fluid:Motorcraft® DOT 4 Low Viscosity (LV) High PerformanceMotor Vehicle Brake FluidPM-20
WSP-M2C197-AFront axle fluid :Motorcraft® SAE 80W-90 Premium Rear Axle LubricantXY-80W90-QL
WSS-M2C942-ARear axle fluid (10.50 inch axle) (E-Locker/non E-Locker):Motorcraft® SAE 75W-85 Premium Synthetic HypoidGear LubricantXY-75W85-QL
WSL-M2C192-ARear axle fluid (Dana M275) (U.S.):Motorcraft® SAE 75W-140 Synthetic Rear Axle LubricantXY-75W140-QL
WSL-M2C192-ARear axle fluid (Dana M275) (Canada):Motorcraft® SAE 75W-140 Synthetic Rear Axle LubricantCXY-75W140-1L
WSP-M2C197-ARear axle fluid (Dana M300) (U.S.):Motorcraft® SAE 80W-90 Premium Rear Axle LubricantXY-80W90-QL
WSP-M2C197-ARear axle fluid (Dana M300) (Canada):
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Capacities and Specifications

SpecificationName
WSH-M1C231-BA/C refrigerant compressor oil:Motorcraft® PAG Refrigerant Compressor OilYN-12-D
ESB-M1C93-BMulti-purpose grease:Motorcraft® Multi-Purpose Grease SprayXL-5-A
--Lock cylinders (U.S.):Penetrating and Lock LubricantXL-1
--Lock cylinders (Canada):Penetrating FluidCXC-51-A
--Lock cylinders (Mexico):Penetrating and Lock LubricantMXL-1
WSD-M1C227-ATransmission, parking brake linkages and pivots, brakepedal shift:Motorcraft® Premium Long-Life GreaseXG-1-E
1Reference the reservoir cap for proper fluid.
If you use oil and fluids that do not meetthe defined specification and viscositygrade, this may lead to:
•Component damage which is notcovered by the vehicle warranty.
•Longer engine cranking periods.
•Increased emission levels.
•Reduced engine performance.
•Reduced fuel economy.
•Degraded brake performance.
We recommend Motorcraft® motor oil foryour vehicle. If Motorcraft® oil is notavailable, use motor oils of therecommended viscosity grade that meetAPI SN requirements and display the APICertification Mark for gasoline engines. Donot use oil labeled with API SN servicecategory unless the label also displays theAPI certification mark.
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Super Duty (TFE) Canada/United States of America, enUSA, Edition date: 201710, Second Printing
Capacities and Specifications

An oil that displays this symbol conformsto current engine, emission system andfuel economy performance standards ofthe International Lubricants SpecificationAdvisory Committee (ILSAC).
Do not use supplemental engine oiladditives because they are unnecessaryand could lead to engine damage that maynot be covered by your vehicle warranty.
Note:Ford recommends using DOT 4 LowViscosity (LV) High Performance Brake Fluidor equivalent meeting WSS-M6C65-A2. Useof any fluid other than the recommendedfluid may cause degraded brakeperformance and not meet the Fordperformance standards. Keep brake fluidclean and dry. Contamination with dirt,water, petroleum products or othermaterials may result in brake systemdamage and possible failure.
Note: Automatic transmissions that requireMERCON® LV transmission fluid shouldonly use MERCON® LV transmission fluid.The use of any other fluid may causetransmission damage.
Alternative Engine Oil forExtremely Cold Climates
To improve engine cold start performance,we recommend that you use the followingalternative engine oil in extremely coldclimates, where the ambient temperaturereaches -22.0°F (-30°C) or below.
Materials
SpecificationName
WSS-M2C947-A
Motorcraft® SAE 0W-20 Premium Synthetic Blend MotorOil:Engine Oil - SAE 0W-20XO-0W20-QSP
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