What is the typical purpose of using synthetic oil in an engine?

Using synthetic oil in an engine primarily serves to provide enhanced performance and protection at high temperatures compared to conventional oil. Synthetic oils are engineered to achieve superior lubrication characteristics that help maintain viscosity and reduce friction under extreme conditions. This is crucial in high-stress environments, such as engines that operate at elevated temperatures or under heavy loads. The molecular structure of synthetic oil allows it to flow better at cold temperatures and resist breakdown at high temperatures, thereby ensuring a stable film of lubrication that can protect engine components, reduce wear, and extend engine life.

In contrast, other options do not accurately reflect the primary benefits of synthetic oil. For instance, while synthetic oil may contribute to quieter engine operation, that is not its typical purpose. Increasing fuel consumption is contrary to the intended benefits, as synthetic oils are designed to improve fuel economy, not diminish it. Additionally, prevention of oil leaks is not a primary function; while synthetic oils may provide some benefits in sealing, their main advantages are related to high-temperature performance and longevity. Hence, the correct answer highlights the key advantage of synthetic oils in providing enhanced performance and protection in demanding engine conditions.