1998 Chevrolet Cavalier Owner's Manual - Page 261

Fuel You can be injureu and p u r vehicle could be damaged if you try to do service work on a vehicle without knowing enough about it. Be sure you have suffkient knowledge, experience, theproper replacement parts and tools before attempt any vehicle you maintenance task. 0 Be sure to use the proper nuts, bolts and other fasteners. "English"and 6Lmetric'' If you use fasteners can be easily confused, the wrong fasteners,parts can later break or fall off. You couldbe hurt. Use regular unleaded gasoline rated 87 octane or at higher. At a minimum, should meet specifications it States and CGSB 3.5-M93 ASTM D4814 in the United in Canada. Improved gasoline specifications have been developed by the American Automobile Manufacturers Association (AAMA) for better vehicle performance AAMA and engine protection. Gasolines meeting the specification could provide improved driveability and emission control system protection compared to other gasolines. Be sure the posted octaneis at least 87. If the octaneis less than 87, you may get a heavy knocking noise when you drive. If it's bad enough, it can damage your engine. Adding Equipment to Outside of the Your Vehicle Things you might add to outside of your vehicle can the affect the airflow around This may cause wind noise it. and affect windshield washer performance. Check with your dealer before adding equipment the outside of to your vehicle. If you're using fuel rated 87 octane or higher and you at hear heavy knocking, your engine needs service. But don't worryif you hear alittle pinging noise when you're accelerating or driving up a hill. That's normal, and you don't have to buy a higher octane to getrid fuel of pinging. It's the heavy, constant knock that means you have a problem. 6-3