Your vehicle’s engine is filled at the factory with aMobil 1® synthetic oil, which meets all requirements foryour vehicle.Substitute Engine Oil: When adding oil to maintainengine oil level, oil meeting GM Standard GM4718Mmay not be available. You can add substitute oildesignated SAE 5W-30 with the starburst symbol at alltemperatures. Substitute oil not meeting GM StandardGM4718M should not be used for an oil change.Engine Oil AdditivesDo not add anything to the oil. The recommended oilswith the starburst symbol that meet GM standards are allyou need for good performance and engine protection.Engine Oil Life SystemWhen to Change Engine OilYour vehicle has a computer system that lets you knowwhen to change the engine oil and filter. This isbased on engine revolutions and engine temperature,and not on mileage. Based on driving conditions,the mileage at which an oil change will be indicated canvary considerably. For the oil life system to workproperly, you must reset the system every time the oilis changed.When the system has calculated that oil life has beendiminished, it will indicate that an oil change isnecessary. A CHANGE ENGINE OIL SOON messagewill come on. See DIC Warnings and Messages onpage 3-53. Change the oil as soon as possible within thenext 600 miles (1 000 km). It is possible that, if youare driving under the best conditions, the oil life systemmight not indicate that an oil change is necessary forover a year. However, the engine oil and filter must bechanged at least once a year and at this time thesystem must be reset. Your dealer/retailer has trainedservice people who will perform this work using genuineparts and reset the system. It is also important tocheck the oil regularly and keep it at the proper level.If the system is ever reset accidentally, you must changethe oil at 3,000 miles (5 000 km) since your last oilchange. Remember to reset the oil life system wheneverthe oil is changed.How to Reset the Engine Oil Life SystemThe Engine Oil Life System calculates when tochange the engine oil and filter based on vehicle use.Whenever the oil is changed, reset the system so it cancalculate when the next oil change is required. If asituation occurs where you change the oil priorto a CHANGE ENGINE OIL SOON message beingturned on, reset the system.5-16
