Following are from 2015 RAM User Guide:
Pg. 38
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.
DIESEL ENGINE BREAK-IN RECOMMENDATIONS
• For 3.0L diesel engine break-in recommendations, refer to Diesel Engine Break-In Recommendations on pg. 182
• For 6.7L Cummins diesel engine break-in recommendations, refer to Diesel Engine Break-In Recommendations on pg. 192
Pg. 192
DIESEL ENGINE BREAK-IN RECOMMENDATIONS
The Cummins®turbocharged diesel engine does not require a break-in period due to its construction.
Normal operation is allowed, providing the following recommendations are followed:
• Warm up the engine before placing it under load.
• Do not operate the engine at idle for prolonged periods.
• Use the appropriate transmission gear to prevent engine lugging.
• Observe vehicle oil pressure and temperature indicators.
• Check the coolant and oil levels frequently.
• Vary throttle position at highway speeds when carrying or towing significant weight.
NOTE:
Light duty operation such as light trailer towing or no load operation will extend the time before the engine is at full efficiency.
Reduced fuel economy and power may be seen at this time.
Because of the construction of the Cummins®turbocharged diesel engine, engine run-in is enhanced by loaded operating conditions which allow the engine parts to achieve final finish and fit during the first 6,000 miles (10 000 km).
So there you have it.............
Guts
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