2015 Jeep Grand Cherokee User Guide SRT - Page 177

DIESEL DIESEL ENGINE BREAK-IN RECOMMENDATIONS The 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. 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. NON-DETERGENT OR STRAIGHT MINERAL OILS MUST NEVER BE USED. DIESEL ENGINE STARTING PROCEDURES Normal Starting Procedure 1. Apply the parking brake. 2. Ensure the shift lever is in the PARK position. 3. Press and hold the brake pedal while pressing the ENGINE START/STOP button once and the system will engage the starter to crank the engine. NOTE: • A delay of the start of up to five seconds is possible under very cold conditions. The "Wait to Start" telltale will be illuminated during the pre-heat process, When the engine Wait To Start light goes off the engine will automatically crank. • If you wish to stop the cranking of the engine prior to the engine starting, press the button again. 4. Check that the oil pressure warning light has turned off. 5. Release the parking brake. 175