2006 Dodge Ram 1500 Pickup Owner's Manual - Page 434

434 MAINTAINING YOUR VEHICLE Engine Oil Identification (API) Symbol There is a symbol to aid you in selecting the proper engine oil. This symbol means that the oil has been certified by the American Petroleum Institute (API). The manufacture only recommends API Certified engine oils that meet the requirements of DaimlerChrysler Material Standard MS-6395. Use Mopar or an equivalent oil meeting the specification MS-6395. Engine Oil Viscosity (SAE Grade) For 3.7L/4.7L engines SAE 5W-30 engine oil is recommended for all operating temperatures. For the 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. Your engine oil filler cap also shows the recommended engine oil viscosity for your vehicle. For information on engine oil filler cap location, see the Engine Compartment illustration 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 There are a number of engine oils being promoted as either synthetic or semi-synthetic. If you chose to use such a product, use only those oils that are API Certified and meet the SAE viscosity standard. Follow the service schedule that describes your driving type. Materials Added to Engine Oil The manufacture strongly recommends against the addition of any additives (other than leak detection dyes) to