2011 Chrysler 300 Owner Manual - Page 368

366 STARTING AND OPERATING optimum performance. The use of premium gasoline is Reformulated Gasoline not recommended, as it will not provide any benefit over Many areas of the country require the use of cleaner burning gasoline referred to as "Reformulated Gasoline." regular gasoline in these engines. Reformulated gasoline contains oxygenates and are speLight spark knock at low engine speeds is not harmful to cifically blended to reduce vehicle emissions and imyour engine. However, continued heavy spark knock at prove air quality. high speeds can cause damage and immediate service is required. Poor quality gasoline can cause problems such The manufacturer supports the use of reformulated gasoas hard starting, stalling, and hesitations. If you experi- line. Properly blended reformulated gasoline will proence these symptoms, try another brand of gasoline vide excellent performance and durability of engine and fuel system components. before considering service for the vehicle. 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 gasolines that meet the WWFC specifications if they are available. Gasoline/Oxygenate Blends Some fuel suppliers blend unleaded gasoline with oxygenates such as Ethanol. Fuels blended with oxygenates may be used in your vehicle.