Conventional motor oil is a type of lubricant made from refined crude oil. It is designed to reduce friction and wear in an engine, helping to keep it running smoothly. This oil typically contains additives that enhance its performance, such as detergents to clean engine parts and anti-wear agents to protect against damage. While conventional motor oil is effective for many vehicles, it may not provide the same level of protection as synthetic oils, especially in extreme temperatures. Regular oil changes are essential to maintain engine health, as old oil can break down and lose its protective qualities over time.