Engine Oil Additives / Engine OilFlushesDo not add anything to the oil. The recommended oilswith the starburst symbol that meet GM standards are allthat is needed for good performance and engineprotection.Engine oil system flushes are not recommended andcould cause engine damage not covered by the vehiclewarranty.Engine Oil Life SystemWhen to Change Engine OilThis vehicle has a computer system that indicates whento change the engine oil and filter. This is based onengine revolutions and engine temperature, and not onmileage. Based on driving conditions, the mileage atwhich an oil change is indicated can vary considerably.For the oil life system to work properly, the systemmust be reset every time the oil is changed.When the system has calculated that oil life has beendiminished, it indicates that an oil change is necessary.A CHANGE ENGINE OIL SOON message in theDriver Information Center (DIC) comes on. Change theoil as soon as possible within the next 600 miles(1 000 km). It is possible that, if driving under the bestconditions, the oil life system might not indicate thatan oil change is necessary for over a year. However, theengine oil and filter must be changed at least once ayear and at this time the system must be reset.Your dealer/retailer has trained people who will performthis work using genuine parts and reset the system.It is also important to check the oil regularly and keep itat the proper level.If the system is ever reset accidentally, the oil must bechanged at 3,000 miles (5 000 km) since the last oilchange. Remember to reset the oil life system wheneverthe oil is changed.6-16
