It sure can. You can use up to 20% without to much trouble. Unless your fuel already has 10 or 15% alcohol in it. There is a label on the pump.
Just dont get carried away with adding to much. Dont expect power gains unless, the tune/setup is octane octane deficient. Then, if it stops the knock it worked.
If the car is in tune and not detonatiing now, Then adding the E85 wont help at all.