what the difference between air filter and air filter with oil bath?

An air filter is a device that is used to remove particulate matter from the air before it enters an engine's induction system. It typically consists of a pleated paper or foam element that traps dust and other particles as air passes through it.

An air filter with an oil bath, also known as an oil-bath air cleaner, works on a similar principle but uses oil to trap dirt and debris instead of a dry filter element. The air enters through a pipe and then passes through a container filled with oil. The oil captures dirt particles and allows clean air to pass through to the engine.

The main difference between the two is the way they trap dirt and debris. A dry air filter uses a pleated paper or foam element, while an oil-bath air cleaner uses oil to capture particles. Additionally, an oil-bath air cleaner is more commonly used in older vehicles and heavy machinery, while a dry air filter is more common in modern vehicles.