Driving fast can indeed help clean your engine to a certain extent. When the engine is driven at higher speeds, it operates under higher temperatures. These increased temperatures can help burn off carbon deposits that may have built up over time. The combustion process at higher speeds also tends to be more efficient, which can further aid in cleaning the engine.
When an engine is driven hard, the throttle is often wide open. This means that more air and fuel are being delivered to the combustion chamber, resulting in a more complete and thorough burn. This can help clean out any carbon deposits that may have accumulated on the intake valves, spark plugs, or cylinder heads.
In my personal experience, I have noticed that after driving my car at high speeds on the freeway, the engine seems to run smoother and more efficiently. I believe this is because the higher temperatures and increased airflow help to clean out any buildup that may have occurred during regular driving conditions.
However, it is important to note that driving fast alone may not be enough to completely clean your engine. Regular maintenance, such as oil changes and fuel system cleanings, is still necessary to ensure optimal engine performance. Additionally, driving fast should be done in moderation and within the limits of the law and safety. Excessive speeding can put yourself and others at risk.
To summarize, driving fast can help clean your engine to some extent by burning off carbon deposits and promoting efficient combustion. However, it should be complemented with regular maintenance and performed responsibly.