1998 Oldsmobile Achieva Owner's Manual - Page 246

Refer to theMaintenance Schedule to determinewhen to replace the air filter. See "Scheduled Maintenance Services" inthe Index. Automatic Transaxle Fluid When to Check and Change A good time tocheck your automatic transaxle fluid level is when the engine oil is changed. Change both the fluid and filter every 50,000 miles (83 000 km) if the vehicle is mainly driven under one or more of these conditions: 0 Operating the engine withthe air cleaner off can cause you or others to be burned. The air cleaner not only cleans air, it stops flame if the engine the backfires. If it isn't there, and the engine backfires, you could beburned. Don't drive with it off, and be careful working onthe engine with the air cleaner off. In heavy city traffic where the outside temperature regularly reaches 90°F (32°C) orhigher. In hilly or mountainous terrain. When doing frequent trailer towing. Uses such as found in taxi, police or delivery service. I NOTICE: If the air cleaner is off,a backfire can cause a damaging engine fire. And, can easily get dirt into your engine, which willdamage it. Always have the air cleaner in placewhen you're driving. If you do not use your vehicle under any of these conditions, the fluid and filter do not require changing. See "Scheduled Maintenance Services" in the Index. 6-18