What should an engine do after starting to ensure optimal performance?

The most effective practice for an engine after starting is to run until all parts reach normal operating temperatures. This process is crucial because engines are designed to operate optimally within a specific temperature range. When the engine components are cold, the oil is also thick and does not lubricate as effectively, leading to increased wear and potential damage.

By allowing the engine to warm up, the oil thins out, providing better lubrication and ensuring that all moving parts can function smoothly. Additionally, many components, including the engine itself and the exhaust system, benefit from reaching the intended operational temperature, which can enhance fuel efficiency and reduce emissions.

While a brief warm-up period can be beneficial, simply running at maximum speed would not allow sufficient time for the engine components to reach their ideal operating temperatures, potentially leading to premature wear. Shutting down immediately after starting obviously does not allow the engine to operate at all. Therefore, running until all parts are adequately warmed is the best practice for ensuring long-term reliability and efficiency of the engine.