Like most car manufacturers, Saturn recommends that you change your oil every 3,000 miles or three months (whichever comes first). Most of the newer Saturn cars have automatic indicators that will tell you when you need to have your car serviced with an oil change. Authorized Saturn shops will reset your oil change indicator after they have finished changing the oil in your Saturn car.
It is recommended by Saturn that you (or your mechanic) replace the engine’s air filter during the oil change appointment after each 50,000 mile interval. Since it is easy to forget when your air filter was last changed, it is a good idea to have your air filter checked when it seems like you’re coming up on 50,000 miles since the last filter change. This means you should change your air filter roughly every 16 to 17 times your oil is changed, assuming you’ve kept up with the recommended oil change maintenance schedule.
The recommended oils for a Saturn conform to GM standard GM6094M. Oils that meet this standard are ideal for servicing oil changes. It is not recommended that any additives be combine with an oil that meets this standard. If you don’t use what is called “Top Tier Detergent Gasoline” in your Saturn, a bottle of GM Fuel System Treatment PLUS should be added to the gas tank at each oil change to help clean performance inhibiting deposits from forming in fuel injectors and intake valves.
If you have more specific questions about changing the oil in your Saturn, you should be able to find the owners manual on the Saturn.com web site.