2009 Jeep Grand Cherokee Owner Manual SRT8 - Page 355

MAINTAINING YOUR VEHICLE 353 NOTE: Under no circumstances should oil change intervals exceed 6,000 miles (10 000 km) or 6 months whichever comes first. Engine Oil Selection For best performance and maximum protection under all types of operating conditions, the manufacturer only recommends full synthetic engine oils that meet the American Petroleum Institute (API) categories of SM or SM/CF, and meet the requirements of Chrysler Material Standard MS-10725. The manufacturer recommends the use of a full synthetic engine oil, such as Mobil 1௡ SAE 0W-40 or equivalent. Engine Oil Viscosity SAE 0W-40 engine oil is preferred for use within the operating temperatures shown in the engine oil viscosity chart. SAE 5W-40 engine oil is also allowed. The proper SAE viscosity grade of engine oil should be selected based on the following recommendation and be within the operating temperature shown in the engine oil viscosity chart. 7 The engine oil filler cap also shows the recommended engine oil viscosity for your engine. For information on engine oil filler cap location, refer to "Engine Compartment" in this section.