2014 Jeep Wrangler Owner Manual - Page 521

STARTING AND OPERATING 519 • Change the engine oil and oil filter. without MMT be used in your vehicle. The MMT content of gasoline may not be indicated on the gasoline pump, • Disconnect and reconnect the battery to reset the therefore, you should ask your gasoline retailer whether engine controller memory. the gasoline contains MMT. MMT is prohibited in Federal More extensive repairs will be required for prolonged and California reformulated gasoline. exposure to E-85 fuel. Materials Added To Fuel MMT In Gasoline All gasoline sold in the United States is required to MMT (Methylcyclopentadienyl Manganese Tricarbonyl) contain effective detergent additives. Use of additional is a manganese-containing metallic additive that is detergents or other additives is not needed under normal blended into some gasoline to increase octane. Gasoline conditions and they would result in additional cost. blended with MMT provides no performance advantage Therefore, you should not have to add anything to the beyond gasoline of the same octane number without fuel. MMT. Gasoline blended with MMT reduces spark plug life and reduces emissions system performance in some vehicles. The manufacturer recommends that gasoline 5