Blood helps a human work; similar oil helps a vehicle run. Oil lubricates the engine’s moving parts. Therefore, it helps to make the operation smooth. If there are any contaminations, for example, metal shaving mixed with oil, your machine can’t function properly.  Metal shaving can do a minor change in your engine, which may affect your engine. Therefore, your driving experience becomes worse. However, if you keep your problem untreated, your engine will become damaged.