2005 Chrysler 300 Owner's Manual - Page 294

294 MAINTAINING YOUR VEHICLE Engine Oil Viscosity Chart - 3.5L Engines 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. Engine Oil Viscosity (SAE Grade) - 5.7L Engines The recommended engine oil viscosity for vehicles equipped with the 5.7L engine is SAE 5W-20. NOTE: Engine oils higher in viscosity may reduce fuel economy in vehicles equipped with 5.7L engines. Synthetic Engine Oils You may use synthetic engine oils provided that 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 manufacture strongly recommends against the addition of any additives (other than leak detection dyes) to the engine oil. Engine oil is an engineered product and it's performance may be impaired by supplemental additives. 3.5L Engines Lubricants which do not have both, the engine oil certification mark and the correct SAE viscosity grade number should not be used. Disposing of Used Engine Oil And Oil Filters Care should be taken in disposing of used engine oil and oil filters from your vehicle. Used oil and oil filters, indiscriminately discarded, can present a problem to the environment. Contact your dealer, service station, or