1996 Pontiac Bonneville Owner's Manual - Page 248

To provide cleaner air, all gasolines are now required to If you're usingfuel rated atthe recommended octaneor higher and youstiil hear heavy knocking, your engine contain additives that will help prevent deposits from forming in your engine and system, allowing your fuel needs service. But don't worry you hear a little if emission control system to function properly. Therefore, pinging noise when you're accelerating driving upa or to hill. That's normal, and you don't have to buy a higher you should not have to add anything the fuel. In addition, gasolines containing oxygenates, such as octane fuel to get rid pinging. It's the heavy, constant of ethers and ethanol, and reformulated gasolines may knock that means have a problem. you be available in your area to clean theair. General help If your vehicle is certified to meet California Emission Motors recommends that you use these gasolines if Standards (indicated on the underhood tune-up 'label), they mcomply with the specifications described earlier. it is designed to operate fuels that meet California on specifications. If such fuelsare not availablein states adopting California emissions standards, your vehicle NOTICE: will operate satisfactorily on fuels meeting federal specifications, but emission control system performance Your vehicle was not designed fuel that for may be eected. The malfunction indicator lamp on it. your instrument panel may turn on and/or-your vehicle contains methanol. Don't use It can corrode metal parts in your fuel system and damage also If may fail a smog-check test. this occurs, return to your wouldn't authorized Pontiac dealer for diagnosis to determine the plastic and rubber parts. That damage cause of failure. In the eventit is determined that the be covered under your warranty. cause of the condition is the type fuels used, repairs of may not be covered by your warranty. In Canada, some gasolines contain an octane-enhancing additive calledMMT. If you use such fuels, your emission control system performance may deteriorate and the malfunction indicator lamp on your instrument panel may turn on. this happens, return to your If authorized Pontiac dealer service. for ,