2005 Pontiac Bonneville Owner's Manual - Page 280
2005 Pontiac Bonneville Manual
Page 280 highlights
When to Change Engine Oil (Vehicles Without the Engine Oil Life System) If any one of these is true for you, use the short trip/city maintenance schedule: • Most trips are less than 5 miles (8 km). This is particularly important when outside temperatures are below freezing. • Most trips include extensive idling, such as frequent driving in stop-and-go traffic. • You frequently tow a trailer or use a carrier on top of your vehicle. • The vehicle is used for delivery service, police, taxi, or other commercial application. Driving under these conditions causes engine oil to break down sooner. If any one of these is true for your vehicle, then you need to change your oil and filter every 3,000 miles (5 000 km) or 3 months - whichever occurs first. If none of them is true, use the long trip/highway maintenance schedule. Change the oil and filter every 7,500 miles (12 500 km) or 12 months - whichever occurs first. Driving a vehicle with a fully warmed engine under highway conditions will cause engine oil to break down slower. If your vehicle has the Engine Oil Life System, see Engine Oil Life System on page 5-20 for information on when to change your engine oil. 5-20 Engine Oil Life System When to Change Engine Oil If your vehicle has the Engine Oil Life System, it has a computer system that lets you know when to change the engine oil and filter. This is based on engine revolutions and engine temperature and not on mileage. Based on driving conditions, the mileage at which an oil change will be indicated can vary considerably. For the oil life system to work properly, you must reset the system every time the oil is changed. When the system has calculated that oil life has been diminished, it will indicate that an oil change is necessary. An ENGINE OIL CHANGE SOON DIC message will come on. See DIC Warnings and Messages on page 3-62. Change your oil as soon as possible within the next 600 miles (1 000 km). It is possible that, if you are driving under the best conditions, the oil life system may not indicate that an oil change is necessary for over a year. However, your engine oil and filter must be changed at least once a year and at this time the system must be reset. Your dealer has GM-trained service people who will perform this work using genuine GM parts and reset the system. It is also important to check your oil regularly and keep it at the proper level.