Automotive lubricants are substances used to reduce friction between moving parts in vehicles, ensuring smooth operation and preventing wear and tear. They come in various forms, including engine oil, transmission fluid, and grease, each designed for specific components and functions within the vehicle. These lubricants also help to cool engine parts, clean contaminants, and protect against corrosion. Regularly changing automotive lubricants is essential for maintaining vehicle performance and longevity, as old or degraded lubricants can lead to increased friction and potential engine damage.