1997 Pontiac Trans Sport Owner's Manual - Page 329

Some gasolines that are not reformulatedfor low emissions contain an octane-enhancing additive called methylcyclopentadienyl manganesetricarbonyl (MMT); ask your servicestation operator whether or nothis firel contains MMT. General Motors does not recommend the useof such gasolines. If fuels containing MMT are used, spark plug life may be reducedand your emission control system performance may affected. The be malfunction indicator lamp on your instrument panel may turnon. If this occurs, return to your authorized Pontiac dealer for service. To provide cleaner air, all gasolines in the United States are now requiredto contain additives that willhelp prevent deposits from forming your engine and in 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, suchas ethers and ethanol, and reformulated gasolines may available in your be area to help clean the air. General Motors recommends that you use these gasolines if they comply withthe specifications described earlier. I NOTICE: ~ Your vehicle wasnot designed for fuel that Don't use it. It can corrode contains methanol. metal partsin your fuel system and also damage parts. That damage wouldn't plastic and rubber be covered under your warranty. 6-4