1993 Buick Riviera Owner's Manual - Page 275

Section A: Scheduled Maintenance Services Using Your Maintenance Schedules This section tells you maintenance services you the should have done and when you should schedule them. Your Buick dealer knows your vehicle best and wants you to be happy with it. If you go to your dealer for your service needs, you'll know that GM-trained and supported service people will perform the work using genuine GM parts. These schedules are for vehicles that: 0 Selecting the Right Schedule First you'll need to decide which the two schedules is of right for your vehicle. Here's how' to decide which schedule to follow: Schedule I Is any one of these true for your vehicle? Most trips are less than 4 miles (6 km). 0. Most trips are less than 10 miles ( 16 km) when outside temperaturesare below freezing. The engine. isat low speed mostof the time (as in door-to-door delivery, or in stop-and-go traffic). carry passengers and cargo within recommended limits. You will find these limits on your vehicle's Tire-Loading Information label. See "Loading Your Vehicle" in the Index. are driven on reasonable road surfaces within legal driving limits. use the recommended unleaded fuel. See "Fuel" in the Index. 0 You operate your vehicle in dusty areas. If any one (or more) these is true for your driving, of follow Schedule I. 0 0 Schedule I1 Follow ScheduleI1 only if none of the above conditions is true. 273