How often should you change the grease and oil on a Pontiac G5?

How often should you change the grease and oil on a Pontiac G5? The salesman told me that I should change it only when the light comes on, or once a year. I have been under the impression that the oil should be changed every 5000 km. Which is correct, if either?How often should you change the grease and oil on a Pontiac G5?Read your owner's manual.How often should you change the grease and oil on a Pontiac G5?the grease doesnt get changed and you should change your oil every 5000km..good luckHow often should you change the grease and oil on a Pontiac G5?change your oil and filter when it gets dirty regardless of mileage and have the grease nipples lube.

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