1993 Oldsmobile Achieva Owner's Manual - Page 277

Schedule I Schedule I 1 Is any one of these true for your vehicle? Follow Schedule 1 only if none of the above conditions is 1 true. Most trips are less than 4 miles (6 km). Most trips are less than1 miles (16 km) when outside 0 temperatures are below freezing. The engine is at speed most of the time (as in door-tolow door delivery, or in stop-and-go traffic). You operate your vehicle in dusty areas. You tow a trailer. (With some models, you shouldn't ever tow a trailer. See theI d e x under Towing a Trailer.) If any one (or more)of these is true for your driving, follow Schedule I. 275