2007 Chrysler 300 Owner Manual - Page 291

STARTING AND OPERATING 291 content of gasoline may not be indicated on the pump, you should ask your gasoline retailer if his/her gasoline contains MMT. It is even more important to look for gasolines without MMT in Canada, because MMT can be used at levels higher than allowed in the United States. MMT is prohibited in Federal and California reformulated gasolines. Materials Added to Fuel All gasoline sold in the United States is required to contain effective detergent additives. Use of additional detergents or other additives are not needed under normal conditions and they would result in additional cost. Therefore, you should not have to add anything to the fuel. Fuel System Cautions • The use of leaded gas is prohibited by Federal law. Using leaded gasoline can impair engine performance, or damage the emission control system. • An out-of-tune engine, or certain fuel or ignition malfunctions, can cause the catalytic converter to overheat. If you notice a pungent burning odor or some light smoke, your engine may be out-of-tune or malfunctioning and may require immediate service. Contact your dealer for service assistance. • The use of fuel additives, which are now being sold as octane enhancers, are not recommended. Most of these products contain high concentrations of methanol. Fuel system damage or vehicle performance problems resulting from the use of such fuels or additives are not the responsibility of the manufacturer. NOTE: Intentional tampering with emissions control systems can result in civil penalties being assessed against you. 5 CAUTION! Follow these guidelines to maintain your vehicle's performance: