Get a manual on your car from AUTOREPAIRMANUALS.COM
It should be replaced when it begins making a noticeable noise.
Yes Saturn cars have very good gas mileage. They are compact and well made, they have good engineering work behind them that designed a good car with great gas mileage.
You must be talking about a vehicle from space, since there is no such thing as a Nissan Saturn. It's impossible to answer your question as asked.
It is illegal to do so and will void your warranty.
Depends on the year, model, mileage, & condition Saturn you are talking about. Look here to get values: http://www.nadaguides.com/Cars/Saturn
Saturn recommends 5W30. But I put 10W30 in my 2002 Saturn SL2 now that it has higher mileage, and it runs like a gem. I use Quaker State High Mileage (with Slick 50) to give it additional lubrication.
I have a 95 saturn and it cost an average of 300 dollars to get the windshield replaced.
If you're certain that the sound is from the serpentine belt you should check the belt tensioner. A weak tensioner spring will result in slipping and a noisy belt.
The Saturn S series is an old automobile. Commercials for them were first broadcast in 1992. The line was discontinued in 2003 and replaced by the Saturn Ion.
Saturn does have a model called the Ion.It was a compact car sold between 2003 and 2007 and replaced the Saturn S-Series.
i have 230xxx on my 2002 Saturn Vue and i never replaced the clutch
Gas is not getting into the carburetor because no Saturn made ever had one.