Detergents in Flex-Fuel??

I'm just trying to sort out how often I should run some Tier 1 93 octane through my coyote, or if it is even necessary. Are their detergents in Flex-Fuel at the pump that will keep things clean? I know that Ethanol at that level is very clean in and of it's self. But I just want facts on if it is safe to run Ethanol 24/7 - 365?

-Jeff

Just found this.

http://www.ethanolproducer.com/articles/3859/additives-keep-it-business-as-usual-with-e85

Ethanol will leave your engine in a better shape than otherwise.