2001 Chevrolet Tracker Owner's Manual - Page 240

Fuel You can be injured and your vehicle could be damaged if you try to do service workon a vehicle without knowing enough about it. Be sure you have sufficient knowledge, experience, the proper replacement parts and tools before you attempt anyvehicle maintenance task. Be sure touse 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 1 or fall off. You could be hurt. Use regular unleaded gasoline rated at 87 octane or higher. At a minimum, it should meet specifications ASTM D4814 in the United States and CGSB 3.5-M93 in Canada. Improved gasoline specifications have been developed by the American Automobile Manufacturers Association (AAMA) for better vehicle performance and engine protection. Gasolines meeting theAAMA specification could provide improved driveability and emission control system protection compared to other gasolines. Be sure the posted octane at least 87. the octaneis is If less than 87, may get a heavy knocking noise when you you drive. If it's bad enough, can damage your engine. it Adding Equipr- I Your Vehicle ~ - ' ; to t!- Out 'de of -I Things you might add the outsideof your vehicle can to affect the airflow around it. may cause wind noise This and affect windshield washer performance. Check with your dealer before adding equipment the outside of to your vehicle. If you're using fuel rated at 87 octane or higher and yo hear heavy knocking, your engine needs service. But don't worry if you hear a little pinging noise when you're accelerating or driving a hill. That's normal, up and you don't have buy a higher octane fuel get rid to to of pinging. It's the heavy, constant knock that means you have a problem.