2010 Jeep Grand Cherokee Owner's Manual - Page 318

STARTING AND OPERATING 317 MMT In Gasoline MMT is a manganese containing metallic additive that is • poor engine performance blended into some gasoline to increase octane. Gasoline • poor cold start and cold drivability blended with MMT provides no performance advantage beyond gasoline of the same octane number without • increased risk for fuel system component corrosion MMT. Gasoline blended with MMT reduces spark plug To fix a Non-FFV vehicle inadvertently fueled once with life and reduces emission system performance in some E-85 perform the following: vehicles. The manufacturer recommends that gasoline without MMT be used in your vehicle. The MMT content • drain the fuel tank (see your authorized dealer) of gasoline may not be indicated on the gasoline pump, • change the engine oil and oil filter therefore, you should ask your gasoline retailer if the gasoline contains MMT. • disconnect and reconnect the battery to reset the engine controller memory It is even more important to look for gasoline without MMT in Canada, because MMT can be used at levels More extensive repairs will be required for prolonged higher than those allowed in the United States. exposure to E-85 fuel. MMT is prohibited in Federal and California reformulated gasoline. • OBD II "Malfunction Indicator Light" on 5