1998 Chevrolet Astro Owner's Manual - Page 336

Introduction KEEP ENGINE OIL AT THE PROPER LEVEL AND CHANGE A$ RECOMMENDED IMPORTANT- Your Vehicle and the Environment Proper vehicle maintenance not only helps keep your to vehicle in good workingcondition, but also helps the environment. All recommended maintenance procedures are important. Improper vehicle maintenance caneven affect the qualityof the air we breathe. Improper fluid levels or the wrong tire inflationcan increase the level of emissions from your vehicle. To help protect our environment, and to keep your vehicle in good condition, please maintain your vehicle properly. Plan Have you purchased the GM Protection Plan? The Plan supplements your new vehicle warranties. See your Warranty and Owner Assistance booklet, your GM or dealer for details. 7-2