2010 Jeep Liberty Owner's Manual - Page 434

MAINTAINING YOUR VEHICLE 433 NOTE: Under no circumstances should oil change intervals exceed 6,000 miles (10 000 km) or six months, whichever occurs first. 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. Engine Oil Selection For best performance and maximum protection under all types of operating conditions, the manufacturer recomEngine Oil Viscosity mends engine oils that are API Certified and meet the SAE 5W-20 engine oil is recommended for all operating requirements of Chrysler Material Standard MS-6395. temperatures. This engine oil improves low temperature American Petroleum Institute (API) Engine Oil starting and vehicle fuel economy. The engine oil filler Identification Symbol cap also shows the recommended engine oil viscosity for This symbol means that the oil has your engine. For information on engine oil filler cap been certified by the American location, refer to "Engine Compartment" in "Maintaining Petroleum Institute (API). The Your Vehicle" for further information. manufacturer only recommends Lubricants which do not have both the engine oil certiAPI Certified engine oils. fication mark and the correct SAE viscosity grade number should not be used. 7