1998 Buick Riviera Owner's Manual - Page 245

Some gasolines that are not reformulated for low emissions contain an octane-enhancing additive called methylcyclopentadienyl manganese tricarbonyl(MMT); ask your service station operator whether or not his fuel contains MMT. General Motors does not recommend the use of such gasolines. If fuels containing MMT are used, spark pluglife may be reduced and your emission control system performance may affected. The be malfunction indicator lamp on your instrument panel may turn on. If this occurs, return to your authorized Buick dealerfor service. NOTICE: Your vehicle was not designed for fuel that contains methanol. Don't use it. It can corrode metal parts in your fuel system and also damage plastic and rubber parts. That damage wouldn't be covered under your warranty. To provide cleaner air, all gasolines in United States the are now required to contain additives that will help prevent deposits from forming in your engine and fuel system, allowing your emission control system to function properly. Therefore, you should not have to add anything to the fuel. In addition, gasolines containing oxygenates, such as ethers and ethanol, and reformulated gasolines may be available in your area to help clean the air. General Motors recommends that you use these gasolines they comply with the if specifications described earlier. Fuels in Foreign Countries If you plan on driving another country outside the United in States or Canada, the proper fuel may be hard to find. Ne use leaded gasoline or any other fuel not recommended in the previous text on fuel. Costly repairs caused by use of improper fuel wouldn't be covered by your warranty. To check on fuel availability, ask an auto club, or contact a major oil company that does business in the country where you'llbe driving. You can also writeus at the following address for advice. Just tell where you're going and give your us Vehicle Identification Number (VIN). General Motors Overseas Distribution Corporation 1908 Colonel Sam Drive Oshawa, Ontario LlH 8P7 6-4