6-15As in the chart shown previously, SAE 5W- 30 is best foryour vehicle. However, you can use SAE 10W- 30 if it’sgoing to be 0F (- 18C) or above. These numbers on anoil container show its viscosity, or thickness. Do not useother viscosity oils, such as SAE 20W- 50.NOTICE:Use only engine oil with the American PetroleumInstitute Certified For Gasoline Enginesstarburst symbol. Failure to use therecommended oil can result in engine damagenot covered by your warranty.GM Goodwrench oil meets all the requirementsfor your vehicle.If you are in an area where the temperature fallsbelow - 20F (- 29C), consider using either anSAE 5W- 30 synthetic oil or an SAE 0W- 30 oil. Bothwill provide easier cold starting and better protectionfor your engine at extremely low temperatures.Engine Oil AdditivesDon’t add anything to your oil. The recommended oilswith the starburst symbol are all you will need for goodperformance and engine protection.When to Change Engine OilYour vehicle has a computer that lets you know when tochange your engine oil. This is not based on mileage,but on engine revolutions and engine operatingtemperature. When the computer has calculated that theoil needs changing, the GM Oil Life System willindicate that a change is necessary. The mileage betweenoil and filter changes will vary depending on how youdrive your vehicle -- usually between 3,000 miles(5 000 km) and 10,000 miles (16 000 km) since yourlast oil and filter change. Under severe conditions, thesystem may come on before 3,000 miles (5 000 km).Never drive your vehicle more than 10,000 miles(16 000 km) or 12 months (whichever occurs first)without an oil change.The system won’t detect dust in the oil. So, if you drivein a dusty area, be sure to change your oil and filterevery 3,000 miles (5 000 km) or sooner. Remember toreset the CHANGE ENGINE OIL message wheneverthe oil is changed.
