2010 Chrysler 300 Owner Manual SRT8 - Page 334

STARTING AND OPERATING 333 FUEL REQUIREMENTS 6.1L Engine The 6.1L engine is designed to meet all emissions regulations and provide excellent fuel economy and performance when using high-quality premium unleaded gasoline with an octane rating of 91 or Reformulated Gasoline higher. Many areas of the country require the use of cleaner Light spark knock at low engine speeds is not harmful to burning gasoline referred to as "Reformulated Gasoline." your engine. However, continued heavy spark knock at Reformulated gasoline contains oxygenates and are spehigh speeds can cause damage and immediate service is cifically blended to reduce vehicle emissions and imrequired. Poor quality gasoline can cause problems such prove air quality. as hard starting, stalling, and hesitations. If you experience these symptoms, try another brand of gasoline The manufacturer supports the use of reformulated gasoline. Properly blended reformulated gasoline will probefore considering service for the vehicle. vide excellent performance and durability of engine and fuel system components. Over 40 auto manufacturers worldwide have issued and endorsed consistent gasoline specifications (the Worldwide Fuel Charter, WWFC) which define fuel properties necessary to deliver enhanced emissions, performance, and durability for your vehicle. The manufacturer recommends the use of gasoline that meets the WWFC specifications, if they are available. 5