Operating Your Vehicle; Engine Break-In Recommendations - Jeep Wrangler User Manual

OPERATING YOUR VEHICLE

ENGINE BREAK-IN RECOMMENDATIONS

• A long break-in period is not required for the engine and drivetrain
(transmission and axle) in your vehicle.
• Drive moderately during the first 300 miles (500 km). After the initial
60 miles (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. Wide-open throttle
acceleration in low gear can be detrimental and should be avoided.
• The engine oil installed in the engine at the factory is a high-quality
energy conserving type lubricant. Oil changes should be consistent with
anticipated climate conditions under which vehicle operations will occur.
For the recommended viscosity and quality grades, refer to "Maintaining
Your Vehicle".
NOTE: A new engine may consume some oil during its first few thousand
miles (kilometers) of operation. This should be considered a normal part of
the break-in and not interpreted as an indication of difficulty.
Never use Non-Detergent Oil or Straight Mineral Oil in the engine or
damage may result.
CAUTION!
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