I believe the max ethanol specified is 10%. [Edit]. The owner's manual confirms this. It even reinforces it by explaining that you should not use E15, E50 or E85.
I will not try to tell you not to, although I would not. However, E85 will yield about 30% less energy than E0, so even in a car tuned for it, your MPG will be 30% less. If it is not costing you 30% less than the gas you get now (27% if 'now' is E10) then you are paying more per mile. (It still imports less oil so if you are not considering it for microeconomics, ignore my post) E85: Will it Save You Money? - Cars.com