2004 Dodge Neon Owner Manual SRT-4 - Page 115
2004 Dodge Neon Manual
Page 115 highlights
STARTING AND OPERATING 115 vehicle. The MMT content of gasoline may not be indicated on the gasoline pump, therefore you should ask your gasoline retailer whether or not his/her gasoline contains MMT. It is even more important to look for gasolines without MMT in Canada because MMT can be used at higher levels than allowed in the United States. MMT is prohibited in both Federal and California reformulated gasolines. Sulfur in Gasoline Your vehicle may have been designed to meet California low emission standards with cleaner burning California reformulated gasoline with low sulfur. This vehicle may be sold nationwide. Your vehicle will operate satisfactorily on fuels meeting Federal specifications, but emission control system performance may be adversely affected. Gasoline sold outside of California is permitted to have higher sulfur levels which may affect the performance of the vehicle's catalytic converter. This may cause the Check Engine or Service Engine Soon light to illuminate. The manufacturer recommends that you try a different brand of unleaded gasoline having lower sulfur to determine if the problem is fuel related prior to returning your vehicle to an authorized dealer for service. CAUTION! If the Check Engine or Service Engine Soon light is flashing, immediate service is required. See the On Board Diagnostics paragraph in the Maintenance section of this manual. 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 is not needed under normal conditions and would result in unnecessary cost. Therefore you should not have to add anything to the fuel. 5