THE ROLE OF MOTOR OIL
Modern motor oil is a highly specialized product carefully developed by engineers and chemists. An engine depends on the motor oil to permit easy starting, lubricate engine parts and prevent wear, reduce friction, protect against rust and corrosion, keep engine parts clean, minimize combustion chamber deposits, cool engine parts, and protect emissions systems.
Motor oil circulates through your engine and collects many kinds of contaminants that cause engine wear and damage. The oil and the oil filter help remove these contaminants and periodically need to be changed. Check your owner's manual to see which type of oil and oil filter are recommended for your vehicle's engine.