2009 Chrysler PT Cruiser Owner Manual - Page 318
2009 Chrysler PT Cruiser Manual
Page 318 highlights
316 MAINTAINING YOUR VEHICLE Engine Oil Selection For best performance and maximum protection under all types of operating conditions, the manufacturer only 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 been certified by the American Petroleum Institute (API). The manufacturer only recommends API Certified engine oils. Engine Oil Viscosity (SAE Grade) - 2.4L and 2.4L Turbo Engines SAE 5W-30 engine oil is recommended for all operating temperatures. This engine oil improves low temperature starting and vehicle fuel economy. 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. Lubricants which do not have both, the engine oil certification mark and the correct SAE viscosity grade number, should not be used. Synthetic Engine Oils You may use synthetic engine oils, provided the recommended oil quality requirements are met, and the recommended maintenance intervals for oil and filter changes are followed.