1995 Buick Century Owner's Manual - Page 264

Maintenance Schedule J Schedule I Definition Follow Maintenance Schedule I if any one of these is true for your vehicle: Most trips are less than 5 t o 10 miles (8 t o 16 k m ) . This is particularly important when outside temperatures are below freezing. Most trips include extensive idling (such as frequent driving in stop-and-go traffic). Most trips are through dusty areas. e You frequently tow a trailer or use ; carrier on top of I your car. 0 You frequently tow a trailer or use a carrier on top of your car. (With some models, you should never tow a trailer. See "Towing a Trailer" i n the Index.) Schedule I should also be followed if the vehicle is used for delivery service. police, taxi, or other comn1ercial applicattion. Schedule I Intervals Every 6,000 Miles (10 000 km) or 6 months, Whichever Occurs First. Chassis Lubrication At 6,000 Miles (10 000 km) Then Every 12,000 Miles (25 000 km) Tire Rotation Every 15,000 Miles (25 000 km) Air Cleaner Filter Inspection, if driving in dusty conditions Every 30,000 Miles (50 000km) Air Cleaner Filter Replacement Spark Plug Replacer-nent (Except 2.2L Code 4 engine) Spark Plug Wire Inspection Fuel Tank. Cap and Lines Inspection Exhaust Gas Recirculation (EGR) System Inspection (2.2L Code 4 engine only) Engine Accessory Drive Belt Inspection (or every 24 months, whichever occurs first) Cooling System Service (or every 24 months, whichever occurs first) Every 50,000 Miles (83 000 km) Automatic Transaxle Service (severe conditionsonly) Every 100,000 Miles (166 000 km) Spark Plug Replacement (2.2L Code 4 engine Only) - Schedule I Intervals Every 3,000 Miles (5 000 km) or 3 Months, Whichever Occurs First. Engine Oil and Filter Change 7-4