mazda miata mx-5 ethnol question?

[George]

what is the highest E fuel that i can put in the stock engine?
i know that E10 (90% gas and 10% E is ok) but what about the E85 fuel? or anything in between? Will it run without a conversion and what might be the pros and cons of using this fuel?
Thanks for the knowledge! lol.
to the second answer; I am not looking for a green car, im looking for a cheaper way to fuel.
Read this article its pretty interesting.
But thanks good answer..
http://www.physorg.com/news129557670.html