1993 Buick Regal Owner's Manual - Page 227

properly disposing of your used oil, askyour dealer, a service station or a local recycling center for help. I A CAUTION: Air Cleaner Operating the engine with the air cleaner off can cause you or others to be burned. Theair cleaner not onlycleans the air, it stops flame if the engine backfires. If it isn't there, and the engine backfires, you couldbe burned. Don't drive with it off, and be careful working on the engine with the air cleaner off. I The air cleaner is the right front areaof the engine in compartment. Refer to the Maintenance Schedule to determine when to replace the air filter. See "Scheduled Maintenance Services'' inthe Index. 225