2009 Dodge Challenger Owner's Manual - Page 376

374 MAINTAINING YOUR VEHICLE 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. 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 that do not have both, the engine oil certification mark and the correct SAE viscosity grade number should not be used. Engine Oil Viscosity (SAE Grade) - 5.7L Engine SAE 5W-20 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. 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 Viscosity (SAE Grade) - 3.5L Engine NOTE: Vehicles equipped with a 5.7L engine must use SAE 10W-30 engine oil is preferred for for all operating SAE 5W-20 oil. Failure to do so may result in improper temperatures.