2010 Jeep Grand Cherokee Owner's Manual - Page 371

370 MAINTAINING YOUR VEHICLE CAUTION! Overfilling or underfilling the crankcase will cause aeration or loss of oil pressure. This could damage your engine. manufacturer recommends engine oils that are API Certified and meet the requirements of Chrysler Material Standard MS-6395. American Petroleum Institute (API) Engine Oil Identification Symbol This symbol means that the oil has Change Engine Oil been certified by the American The oil change indicator system will remind you that it is Petroleum Institute (API). The time to take your vehicle in for scheduled maintenance. manufacturer only recommends Refer to "Maintenance Schedule" for further information. API Certified engine oils. NOTE: Under no circumstances should oil change intervals exceed 6,000 miles (10 000 km) or six months, whichever occurs first. Engine Oil Selection - Gasoline Engines For best performance and maximum protection for all engines under all types of operating conditions, the CAUTION! Do not use chemical flushes in your engine oil as the chemicals can damage your engine. Such damage is not covered by the New Vehicle Limited Warranty.