1996 Buick Century Owner's Manual

If your vehicle is certified to meet California EmissionStandards (indicated on the underhood tune-up label), itis designed to operate on fuels that meet Californiaspecifications. If such fuels are not available in statesadopting California emissions standards, your vehiclewill operate satisfactorily on fuels meeting federalspecifications, but emission control system performancemay be affected. The malfunction indicator lamp onyour instrument panel may turn on and/or your vehiclemay fail a smog-check test. If this occurs, return to yourauthorized Buick dealer for diagnosis to determine thecause of failure. In the event it is determined that thecause of the condition is the type of fuels used, repairsmay not be covered by your warranty.In Canada, some gasolines contain an octane enhancingadditive called MMT. If such fuels are used, youremission control system performance may be affected.The malfunction indicator lamp on your instrumentpanel may also turn on. If this occurs, return to yourauthorized Buick dealer for service.To provide cleaner air, all gasolines are now required tocontain additives that will help prevent deposits fromforming in your engine and fuel system, allowing youremission control system to function properly. Therefore,you should not have to add anything to the fuel. Inaddition, gasolines containing oxygenates, such as ethersand ethanol, and reformulated gasolines may beavailable in your area to help clean the air. GeneralMotors recommends that you use these gasolines if theycomply with the specifications described earlier.I NOTICE:Your vehicle was not designed for fuel thatcontains methanol. Don’t use it. It can corrodemetal parts in your fuel system and also damageplastic and rubber parts. That damage wouldn’tbe covered under your warranty.6-3