1998 Oldsmobile Cutlass Owner's Manual - Page 223

Fuel You can be injured and your vehicle could be damaged if you try to do service work a on vehicle without knowing enough about it. Be sure you have sufficient knowledge, experience, the proper replacement parts and tools before you attempt any vehicle maintenance task. Be sure to usethe proper nuts, bolts and other fasteners. "Ehglish" and "metric" fasteners can be easily confused.f you use I the wrong fasteners,parts can later break or fall off. You could behurt. Use regular unleaded gasoline rated 87 octane or at higher. At a minimum, should meet specifications it ASTM D4814 in the United States and CGSB3.5-M93 in Canada. Improved gasoline specifications .have been developed bythe American Automobile Manufacturers Association ( M A ) for better vehicle performance and engine protection. Gasolines meeting AAMA the specification could provide improved driveability and emission control system protection compared to other gasolines. Be surethe posted octane is at least 87. If the octane is less than 87, you may get a heavy knocking noise when it you drive. If it's bad enough, can damage your engine. If you're usingfuel rated at 87 octane or higher and you hear heavy knocking, your engine needs service. But don't worry if you hear little pinging noise when a you're accelerating or driving uphill. That's normal, a and you don't have to buy a higher octane fuel to get of pinging. It'sthe heavy' constant knock that means you havea problem. Adding Equipment to the Outside of Your Vehicle Things you might add the outside of your vehicle can to affect the airflow around it. This may cause wind noise and affect windshield washer performance. Check with your retailer before adding equipment the outsideof to your vehicle. 6-3