2010 Jeep Compass Owner Manual - Page 336

STARTING AND OPERATING 335 The tire pressure sensors are covered under one of the Poor quality gasoline can cause problems such as hard following licenses: starting, stalling and hesitations. If you experience these symptoms, try another brand of gasoline (with the apUnited States ...KR5S120123 propriate octane rating for your engine) before considerCanada ...2671-S120123 ing service for the vehicle. FUEL REQUIREMENTS Your vehicle is designed to meet all emission regulations and provide excellent fuel economy when using high-quality regular unleaded gasoline with an octane rating of 87. The use of premium gasoline is not recommended, as it will not provide any benefit over regular gasoline in these engines. Reformulated Gasoline Many areas of the country require the use of cleaner burning gasoline referred to as "Reformulated Gasoline." Reformulated gasoline contains oxygenates and are specifically blended to reduce vehicle emissions and improve air quality. 5 The manufacturer supports the use of reformulated gasoline. Properly blended reformulated gasoline will proLight spark knock at low engine speeds is not harmful to vide excellent performance and durability of engine and your engine. However, continued heavy spark knock at fuel system components. high speeds can cause damage and immediate service is required.