See also:

Checking the Engine Oil
Engine oil is essential to the performance and service of the engine. It is suggested that you check the oil level at least once a week in normal use and more often if you are on a trip or driving ...

Change to "winter weight" oil if necessary
In some climates it is recommended that a lower viscosity "winter weight" oil be used during cold weather. See section 8 for recommendations. If you aren't sure what weight oil you s ...

To help prevent corrosion
You can help prevent corrosion from getting started by observing the following: Keep Your Car Clean The best way to prevent corrosion is to keep your car clean and free of corrosive materials. At ...