1997 GMC Jimmy Owner's Manual - Page 263

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 plug life 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 GM dealer for service. I 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. Fuels in Foreign Countries To provide cleaner ail-, all gasolines in the United States 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 i n your area to help clean the air. General Motors recommends that you use these gasolines if they comply with the specifications described earlier. If you plan on driving in another country outside the United States or Canada, proper fuel may be hard to find. Never the use leaded gnsooline any other fuel not recommended or in the previous text on fuel. Costly repairs causedby use of improper fuel wouldn't be covered by your warranty. To check on ~ w availability, ask an auto club, or 1 contact a nlajor oil company that does business in the country where you'll be driving. You can also write us at the following address for advice. Just tell us where you-re going and give your Vehicle Identil'ication Number (VIN). General Motors International Product Center 1908 Colonel Sam Drive Osha~/a. Ontario L 1 H 8P7 6-4