2007 Chrysler 300 Owner Manual - Page 339

MAINTAINING YOUR VEHICLE 339 Engine Oil Viscosity (SAE Grade) - 3.5L Engine SAE 10W-30 engine oil is preferred for use in 3.5L Engines within the operating temperatures shown in the engine oil viscosity chart. SAE 5W-30 Engine Oil is allowed for use in the 3.5L Engine during cold weather only to improve cold weather starting. In areas where these grades are not generally available, higher SAE grades may be used. Lubricants that have both an SAE grade number and the API Certification Symbol or ACEA category shown on the container should be used. Lubricants that 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. Materials Added to Engine Oil The manufacturer strongly recommends against the addition of any additives (other than leak detection dyes) to the engine oil. Engine oil is an engineered product and its performance may be impaired by supplemental additives. 7 10W-30 OIL VISCOSITY CHART 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 the "Engine Compartment" illustration in this section.