2006 Jeep Grand Cherokee Owner Manual SRT8 - Page 268

268 STARTING AND OPERATING General Information This device complies with part 15 of the FCC rules and RSS 210 of Industry Canada. Operation is subject to the following conditions: • This device may not cause harmful interference. • This device must accept any interference received, including interference that may cause undesired operation. The tire pressure sensors are covered under one of the following licenses: United States ...KR5S120123 Canada ...2671-S120123 TIRE ROTATION RECOMMENDATIONS Do not rotate the tires as the wider rear tires will not fit on the front of the vehicle. FUEL REQUIREMENTS Your vehicle is designed to meet all emission regulations and provide excellent fuel economy when using high quality premium unleaded gasoline having an octane rating of 91 or higher. Spark Knock Light spark knock at low engine speeds is not harmful to your engine. However, continued heavy spark knock at high speeds can cause damage and immediate service is required. Poor quality gasoline can cause problems such as hard starting, stalling and hesitations. If you experience these symptoms, try another brand of "premium" gasoline before considering service for the vehicle.