2001 Buick Regal Owner's Manual - Page 274

How to Check and Add Oil Check oil only when the engine is cold. Allow the engine to cool two to three hours after running. Automatic Transaxle Fluid When to Check and Change A good time to check your automatic transaxle fluid level is when the engine oil is changed. CAUTION: If you remove the supercharger oil fill plug while the engine is hot, pressure may cause hot oil to blow out of the oil fill hole. You may be burned. Do not remove the plug until the engine cools. 1. Clean the area around the oil fill plug before removing it. 2. Remove the oil fill plug using a 3/16 inch Allen wrench. 3. The oil level is correct when it just reaches the bottom of the threads of the inspection hole. 4. Replace the oil plug with the O-ring in place. Tighten to 88 lb-in (10 N·m). 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: D In heavy city traffic where the outside temperature regularly reaches 90_F (32_C) or higher. D In hilly or mountainous terrain. D When doing frequent trailer towing. D Uses such as found in taxi, police or delivery service. If you do not use your vehicle under any of these conditions, change the fluid and filter at 100,000 miles (166 000 km). See "Scheduled Maintenance Services" in the Index. 6-23