2011 Dodge Challenger Owner Manual SRT8 - Page 320

318 STARTING AND OPERATING The TPM sensors are regulated under one of the follow- as hard starting, stalling, and hesitations. If you experiing licenses: ence these symptoms, try another brand of gasoline before considering service for the vehicle. United States ...MRXC4W4MA4 Over 40 auto manufacturers worldwide have issued and Canada ...2546A-C4W4MA4 endorsed consistent gasoline specifications (the Worldwide Fuel Charter, WWFC) which define fuel properties necessary to deliver enhanced emissions, performance, 6.4L Engine and durability for your vehicle. The manufacturer recomThe 6.4L engine is designed to meet all mends the use of gasolines that meet the WWFC speciemissions regulations and provide excel- fications if they are available. lent fuel economy and performance when using high-quality premium unleaded Reformulated Gasoline gasoline with an octane rating of 91 or Many areas of the country require the use of cleaner burning gasoline referred to as "reformulated gasoline." higher. Reformulated gasolines 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 required. Poor quality gasoline can cause problems such FUEL REQUIREMENTS