1998 Oldsmobile 88 Owner's Manual - Page 246

A CAUTION: Operating the engine with the cleaner off can air cause youor others to beburned. Theair cleaner not only cleans the air, stops flameif the engine it backfires. If it isn't there,and the engine backfires, you could be burned. Don't drive with it off, and be careful working on the engine with the air cleaner off. - Automatic Transaxle Fluid -ento Check and Change good time to check your automatic transaxle fluid level is when theengine oil is changed. A Change boththe fluid andfilter every 50,000 miles (83 000 km) the vehicle is mainly driven under one if or moreof these conditions: 0 In heavy city traffic where the outside temperature regularly reaches90 F (32 C) or higher. O O 0 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 isoff, a backfire can cause a damaging engine fire. And, 'can easily get dirt into your engine, which will damage it. Always have the air cleaner in place when you're driving. 0 0 If you do not use your vehicle under any these of conditions, the fluid and filter do not require changing. See "Scheduled Maintenance Services" in Index. the 6-17