1996 Pontiac Bonneville Owner's Manual - Page 247

You can be injured and your vepicle could be damaged if'you try to do service work on a vehicle without knowing enough about it. Be sure you have sufficient .knowledge, experience, and the proper replacement parts and tools before you attempt any vehicle maintenance task. Be sare to use the proper nuts, bolts and other fasteners. %nglishs'and "metric" fasteners can be easily confhsed.you use If the wrong fasteners, parts can laterbreak ' or fall off. You could be hurt. , . If you don't have the 3.8L supercharged Code1 engine, use regular unleaded gasoline rated at 87 octane or higher. If you have the 3.8L supercharged, Code ehgine, use 1 premium unleaded gasoline rated 9 1 octane or higher. at At a minimum, the gasoline you use should meet specificationsASTM I34814 in the UnitedStates and CGSB 3.5-M93 in Can& Improved gasoline specifications have been developed by the American Automobile Manufacturers Association (AAMA) for better vehicle performance and ehgine protection. Gasolims meeting theAAMA specification could provide improved driveability and emission control system protkction compared to other gasolines. Be sure the posted octane for premium is at least91 (at least89 for middle grade and for regular),I€ the 87 octane isless than 87, you may get a heavy knocking noise when you drive. If it's bad-enough,it can damage your engine. i, Fuel .. ' -The8th digit of your vehicle identification number.. ' Y (VIN) shows the code letter for your engine. You ,will find the VIN at the top leftof your instrument panel. (See "Vehicle Identification Number" the Index.) m I , . b _...'. . ' -- . If you have the . L supercharged Code1 engine, in an 38 emergency, you may be able to use lower octane -- as a low as 87 -- if heavy knocking does not occur. If you are using 91 or higher octane unleaded gasoline you and still hear heavy knocking, YQW engine needs service. /