Here's why:
* Oil is a contaminant: Engine oil leaves a greasy residue that attracts dirt and grime, making your car look dull and dirty. It can even trap dirt and grime, making it harder to clean later.
* It can damage the paint: Engine oil can break down the clear coat on your car's paint, leading to fading, discoloration, and even permanent damage.
* It attracts bugs and insects: The oily residue can attract bugs and insects, leading to a sticky mess on your car.
* It can be harmful to the environment: Engine oil is a petroleum product and can harm the environment if it's not disposed of properly.
Instead of using engine oil, use a dedicated car polish or wax. These products are designed to clean, protect, and enhance your car's paint without causing any damage.