1996 Oldsmobile Achieva Owner's Manual - Page 224

could provide improved driveability and emission control system protection comparedto other gasolines. You can be injured and your vehicle 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 sure to use the proper nuts, bolts and other fasteners. "English" and "metric" fasteners can be easily confused. If you use the wrong fasteners, parts can later break or fall off.You could be hurt. Be sure the posted octane is at least 87. If the octane is less than 87, you may get a heavy knocking noise when you drive. If it's bad enough, it can damage your engine. If you're using fuel rated at 87 octane or higher and you still hear heavyknocking, your engine needs service. But don't worryif you hear a little pinging noise when you're accelerating or driving up a hill. That's normal, and you don't have to buy a higher octane fuel to get rid of pinging. It's the heavy, constant knock that means you have a problem. If your vehicle is certified meet California Emission to Standards (indicated onthe underhood tune-up label), it is designed to operate on fuels that meet California specifications. If suchfuels are not available in states adopting California emissions standards, your vehicle will operate satisfactorily on fuels meeting federal specifications, but emission control system performance may be affected.The malfunction indicator lamp on your instrument panel may turn and/or your vehicle on may fail a smog-check test. this occurs, returnto If by your authorized Oldsmobile retailerfor diagnosis to determine the cause of failure. In the event it is determined that the cause of condition is the type of the fuels used, repairs maynot be covered by your warranty. Use regular unleaded gasoline rated at octane or higher. 87 At a minimum, should meet specifications ASTM 14 it 048 i the United States andCGSB 3.5-M93 in Canada. n Improved gasoline specifications have been developed the American Automobile Manufacturers Association (AAMA) for better vehicle performance and engine protection. Gasolines meeting the AAMA specification 6-2