What is the purpose of an oil filter in an engine?

• A. To increase oil pressure
• B. To remove contaminants from the engine oil
• C. To cool the oil before it enters the engine
• D. To mix oil and fuel

Answer: (B)

An oil filter's primary function is to remove contaminants from the engine oil. Over time, engine oil can become contaminated with dirt, metal particles, and sludge that can result from normal engine wear and tear. If these contaminants are not filtered out, they can cause damage to vital engine components, reduce oil flow, and impact overall engine performance.

By maintaining the cleanliness of the oil, an oil filter helps ensure that the engine operates efficiently, enhances the lifespan of the engine, and supports proper lubrication of moving parts. This filtration process is essential for preventing buildup that can lead to engine failure and helps maintain oil quality for optimal performance.