1997 Oldsmobile Cutlass Supreme Owner's Manual - Page 227

If your vehicle is certified to meet California Emission To provide cleaner air, all gasolines in the United States Standards (indicated on the underhood tune-up label), it are now required to contain additives that will help is designed to operate on fuels that meet California prevent deposits from forming in your engine fuel and specifications. If such fuels are not available in states to system, allowing your emission control system adopting California emissions standards, your vehicle function properly. Therefore, you should not have to add will operate satisfactorily on fuels meeting federal anything to thefuel. In addition, gasolines containing specifications, but emission control system performance oxygenates, such as ethers and ethanol, and may be affected.The malfunction indicator lamp on reformulated gasolines may be available in your area to your instrument panel may turn on andor your vehicle help clean the air. General Motors recommends that you may fail a smog-checktest. If this occurs, return to your use these gasolines if they comply with the authorized Oldsmobile retailerfor diagnosis to specifications described earlier. determine the cause of failure. In the event it is s determined that the cause of the conditionis the typeof fuels used, repairs may not be covered by your warranty. NOTICE: Some gasolines that are not reformulated for low Your vehicle was not designed for fuel that emissions contain an octane-enhancing additive called contains methanol. Don't use it. It can corrode methylcyclopentadlenyl manganese tricarbonyl( " T ) ; metal parts in your fuel system and also damage ask your service station operator whether or his not fuel plastic and rubber parts. That damage wouldn't contains MMT. General Motors does not recommend the use of such gasolines.If fuels containing MMT are used, be covered under your warranty. spark pluglife may be reduced and your emission control system performance may be affected. The malfunction indicator lamp on your instrument panel may turn on.If this occurs, return to your authorized Oldsmobile retailer for service. 6-4