1996 Pontiac Firebird Owner's Manual - Page 244

If your vehicle is certified to meetCalifornia Emission Standards (indicated on the underhood tune-up label), it is designed to operate on fuels meet California that specifications. If such fuels arenot available in states adopting California emissions standards, your vehicle will operate satisfactorily on fuelsmeeting federal specifications, but emission control system performance may be affected. The malfunction indicator lampon your instrument panel may turn on and/or your vehicle may fail a smog-check test. If this occurs, return to your authorized Pontiac dealer for diagnosis to determine the cause of failure. In the event it isdetermined that the cause of the condition is the type of fuels used, repairs may not be covered by your warranty. To provide cleanerair, all gasolines 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. Therefme, you should not have to add anything tothe fuel. In addition, gasolines containing oxygenates, such as ethers and ethanol, and reformulated gasolines may be available in your area to help cleanthe air. General Motors recommends that you use these gasolines if they comply with the specifications described earlier. NOTICE: I In Canada, some gasolines contain an octane-enhancing additive called MMT. If you use such fuels, your emission control system performance may deteriorate and the malfunction indicator lampon your instrument panel may turn on. If this happens, return to your authorized Pontiac dealer for service. Your vehicle was not designed for fuel that contains methanol. Don't it. Itcan corrode use metal partsin your fuel system and also damage plastic and rubber parts. That damage wouldn't be covered under your warranty. 6-3