2015 Dodge Challenger Owner Manual SRT - Page 430

428 STARTING AND OPERATING Over 40 auto manufacturers worldwide have issued and endorsed consistent gasoline specifications (the World6.2L Supercharged And 6.4L Engine wide Fuel Charter, WWFC) which define fuel properties necessary to deliver enhanced emissions, performance, The 6.2L supercharged engine and 6.4L and durability for your vehicle. The manufacturer recomengine is designed to meet all emissions mends the use of gasolines that meet the WWFC speciregulations and provide excellent fuel fications if they are available. economy and performance when using Reformulated Gasoline high-quality premium unleaded gasoline Many areas of the country require the use of cleaner with an octane rating of 91 or higher. burning gasoline referred to as "Reformulated Gasoline." Light spark knock at low engine speeds is not harmful to Reformulated gasoline contain oxygenates and are speyour engine. However, continued heavy spark knock at cifically blended to reduce vehicle emissions and imhigh speeds can cause damage and immediate service is prove air quality. required. Poor quality gasoline can cause problems such as hard starting, stalling, and hesitations. If you experi- The manufacturer supports the use of reformulated gasoence these symptoms, try another brand of gasoline line. Properly blended reformulated gasoline will provide excellent performance and durability of engine and before considering service for the vehicle. fuel system components. FUEL REQUIREMENTS