2010 Jeep Grand Cherokee Owner Manual SRT8 - Page 283

282 STARTING AND OPERATING General Information FUEL REQUIREMENTS This device complies with part 15 of the FCC rules and 6.1L Engine RSS 210 of Industry Canada. Operation is subject to the The 6.1L engine is designed to meet all following conditions: emissions regulations and provide excel• This device may not cause harmful interference. lent fuel economy and performance when using high-quality premium unleaded • This device must accept any interference received, gasoline with an octane rating of 91 or including interference that may cause undesired higher. operation. Light spark knock at low engine speeds is not harmful to The tire pressure sensors are covered under one of the your engine. However, continued heavy spark knock at following licenses: high speeds can cause damage and immediate service is required. Poor quality gasoline can cause problems such United States ...KR5S120123 as hard starting, stalling, and hesitations. If you experiCanada ...2671-S120123 ence these symptoms, try another brand of gasoline before considering service for the vehicle.