User Guide Instruction Manual

ENGINE BREAK-IN RECOMMENDATIONS

For vehicles equipped with the 3.6L or 5.7L use the following engine break-in recom-

mendations:

Alongbreak-inperiodisnotrequiredforthedrivetrain(engine,transmission,clutch,and

rear axle) in your new vehicle.

Drive moderately during the first 300 mi (500 km). After the initial 60 mi (100 km),

speeds up to 50 or 55 mph (80 or 90 km/h) are desirable.

While cruising, brief full-throttle acceleration within the limits of local traffic laws

contributes to a good break-in. However, wide-open throttle acceleration in low gear can

be detrimental and should be avoided.

The engine oil, transmission fluid, and axle lubricant installed at the factory is high-quality

and energy-conserving. Oil, fluid, and lubricant changes should be consistent with

anticipated climate and conditions under which vehicle operations will occur. For the

recommended viscosity and quality grades, refer to “Maintenance Procedures” in “Main-

taining Y our V ehicle”.

CAUTION!

Never use Non-Detergent Oil or Straight Mineral Oil in the engine or damage may

result.

NOTE:

Anewenginemayconsumesomeoilduringitsfirstfewthousandmiles(kilometers)of

operation. This should be considered a normal part of the break-in and not interpreted as

an indication of difficulty. Please check your oil level with the engine oil indicator often

during the break in period. Add oil as required.

For vehicles equipped with the 6.4L use the following engine break-in recommendations:

Despite modern technology and World Class manufacturing methods, the moving parts of

the vehicle must still wear in with each other . This wearing in occurs mainly during the first

500 miles (805 km) and continues through the first oil change interval.

It is recommended for the operator to observe the following driving behaviors during the

new vehicle break-in period:

0to100miles(0to161km):

•Donotallowtheenginetooperateatidleforanextendedperiodoftime.

•Depresstheacceleratorpedalslowlyandnotmorethanhalfwaytoavoidrapid

acceleration.

•Avoidaggressivebraking.

•Drivewiththeenginespeedlessthan3,500RPM.

•Maintainvehiclespeedbelow55mph(88km/h)andobservelocalspeedlimits.

OPERATING YOUR VEHICLE