1994 Buick LeSabre Owner's Manual - Page 271

Selecting the Right Schedule First you'll need to decide which of the two schedulesis right for your vehicle. Here's how to decide which schedule to follow: 0 The engine is at low speed most of the time (as in door-to-door delivery, or in stop-and-go traffic). 0 You operate your vehicle in dusty areas. You tow a trailer. Schedule I Is any one of these true foryour vehicle? Most trips are less than 4 miles (6 km). Most trips are less than 10 miles (16 km')when outside temperatures are below freezing. If any one (or more) of these 1s true for your driving, follow Schedule I. Schedule I1 Follow Schedule I1 only if none of the above conditions is true. 269