It is not really an issue of detergents but the synthetic filtering process ( hence the name synthetic) It basically removes more waxes to make a better flowing oil which makes it superior to conventional filtering duno. This makes is more noticcable for leaks . It doesn't cause them it just lets you know you already have them and it passes through the smaller holes in gaskets.
If you got to dyno and to syn there is no problem to do either or. It is up to you there is no kind of damage bettween them, It is the difference bettween filtered water and tap water.
You can drink both ,but why?