I detail my engine when I get my car home from the dealer. I use Adams products and get it spotless before it has a chance to pick up any road grime. If you start new, its easy to findthe trouble areas that will show in the future. Stay ahead is the key. My engine bays look better than new after 60k miles. My Dart has 2300 miles on it in three weeks as my comuter car but still looks better than the day I picked it up. Adams Polishes is the best product and service. They always make it right. Take a look.