2015 Dodge Charger Owner Manual - Page 453

STARTING AND OPERATING 451 5.7L Engine - If Equipped This engine is designed to meet all emissions regulations and provide satisfactory fuel economy and performance when using high-quality unleaded gasoline having an octane range of 87 to 89. The manufacturer recommends the use of 89 octane for optimum Reformulated Gasoline performance. The use of premium gasoline is not recomMany areas of the country require the use of cleaner mended, as it will not provide any benefit over regular burning gasoline referred to as "Reformulated Gasoline." gasoline in these engines. Reformulated gasoline contain 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 The manufacturer supports the use of reformulated gasorequired. Poor quality gasoline can cause problems such line. Properly blended reformulated gasoline will proas hard starting, stalling, and hesitations. If you experivide excellent performance and durability of engine and ence these symptoms, try another brand of gasoline 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. 5