2008 Chrysler 300 Owner Manual SRT8 - Page 394

392 MAINTAINING YOUR VEHICLE Change Engine Oil Refer to the Maintenance Schedule in Section 8. NOTE: Under no circumstances should oil change intervals exceed 6,000 mi (10 000 km) or six months, whichever occurs first. Engine Oil Selection For best performance and maximum protection under all types of operating conditions, the manufacturer only recommends full synthetic engine oils that meet the American Petroleum Institute (API) categories of SM or SM/CF, and meet the requirements of DaimlerChrysler Material Standard MS-10725. The manufacturer recommends the use of a full synthetic engine oil, such as Mobil 1௡ SAE 0W-40 or equivalent. Engine Oil Viscosity (SAE Grade) SAE 0W-40 engine oil is preferred for use in 6.1L Engines within the operating temperatures shown in the engine oil viscosity chart. SAE 5W-40 Engine Oil is also allowed for use in 6.1L Engines. The proper SAE viscosity grade of engine oil should be selected based on the following recommendation and be within the operating temperature shown in the engine oil viscosity chart.