WHY CHANGE YOUR OIL- AND HOW OFTEN?

What does oil do for a car's engine? If asked this question, most people would answer lubricate." And while lubrication is very important because it reduces friction and wear between the moving parts, it is by no means the only thing that oil does. 

Oil also:

• Carries heat away from critical areas and makes parts run cooler.
• Provides a seal between the cylinder walls and pistons.
• Combats rust and corrosion.
• Reduces engine noise.
• Combines with the oil filter to remove contaminants from the engine.

When performing these tasks, oil is subjected to extreme environmental conditions. Engine temperatures can range from below zero during winter shutdown periods to well over 400°F while in operation. A variety of contaminants that eat away at engine parts is constantly being introduced into the system. In addition, oil can be thinned by gasoline and water, and its protective additives can evaporate. With all of these factors taking their toll, it becomes critical that the oil is changed frequently.

Consult your owners manual to determine how often the oil and filter should be changed. And never be concerned about changing the oil too often; it has been proven that frequent changes are the key to a long and trouble-free engine life. In fact, many professional mechanics claim that a car's life can be doubled or even tripled by changing the oil and filter every three months or 3,000 miles.

Another important thing to keep in mind is this: You can purchase top-quality oil and filters from auto centers and discount stores at much cheaper prices than service stations charge. Many stores also sell oil by the case at even greater savings. Watch for sales and stock up on these items when the price is right. Then you'll have everything you need when it comes time to change your oil, and you'll save lots of money in the long run.