What oil does in your engine
As your engine runs, hundreds of parts are constantly moving around inside your engine, rubbing up against one another, creating heat and friction, which wears down your engine. Therefore, clean motor oil is essential to your engine’s lifespan and performance. Motor oil keeps your engine lubricated, helping to protect your engine against excess heat and friction.
Over time, motor oil breaks down and gets polluted, making it less effective. Therefore, vehicle manufacturers recommend periodic oil changes, usually every three months, or 3,000 miles. This ensures that your engine is always properly lubricated, and performing well.