Engine Oil Additives / Engine OilFlushesDo not add anything to the oil. The recommended oilswith the starburst symbol that meet GM standards areall that 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 the DriverInformation Center (DIC) comes on. Change the oil assoon as possible within the next 600 miles (1 000 km).It is possible that, if driving under the best conditions, theoil life system might not indicate that an oil change isnecessary for over a year. However, the engine oil andfilter must be changed at least once a year and at thistime the system must be reset. Your dealer/retailer hastrained people who will perform this work using genuineparts and reset the system. It is also important to checkthe oil regularly and keep it at 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.5-16
