Degreasers are a more powerful cleaner designed to remove stubborn grease and oil from a car's engine bay, jams and lower sections of the car. It is important to note that Degreasers are not exactly the same as APCs. While APCs can include degreasing properties, they are more of a versatile cleaner that can be used on various surfaces. Degreasers are specifically formulated to tackle tough grease and oily products which can build up over time and are normally located on the exterior of the car or engine bay.