1994 Buick Regal Owner's Manual - Page 269

Selecting the Right Schedule First you'll need to decide which of the two schedules is 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). You operate your vehicle in dusty areas. 0 0 You tow a trailer. Schedule I Is any one of these true for your 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 is true for your driving, follow Schedule I. Schedule I1 Follow Schedule I1 only if none of the above conditions is true. 267