2013 Dodge Journey Owner Manual - Page 473

STARTING AND OPERATING 471 MMT In Gasoline Fuel System Cautions MMT is a manganese-containing metallic additive that is blended into some gasoline to increase octane. Gasoline CAUTION! blended with MMT provides no performance advantage beyond gasoline of the same octane number without MMT. Follow these guidelines to maintain your vehicle's Gasoline blended with MMT reduces spark plug life and performance: reduces emissions system performance in some vehicles. • The use of leaded gas is prohibited by Federal law. Using leaded gasoline can impair engine perforThe manufacturer recommends that gasoline without MMT mance and damage the emissions control system. be used in your vehicle. The MMT content of gasoline may • An out-of-tune engine or certain fuel or ignition not be indicated on the gasoline pump, therefore, you malfunctions can cause the catalytic converter to should ask your gasoline retailer whether the gasoline overheat. If you notice a pungent burning odor or contains MMT. MMT is prohibited in Federal and California some light smoke, your engine may be out of tune reformulated gasoline. or malfunctioning and may require immediate serMaterials Added To Fuel vice. Contact your authorized dealer for service assistance. All gasoline sold in the United States is required to contain effective detergent additives. Use of additional detergents or (Continued) other additives is not needed under normal conditions and they would result in additional cost. Therefore, you should not have to add anything to the fuel. 5